At the dated check, the references listed below either did not resolve in
Crossref or DataCite, or carried a retraction notice. Each one is shown with the
registry record that put it there.
The 71 references without a DOI — listed, not checked
no DOI — not checkedAkkemik Ü , Yaman B (2012). Wood Anatomy of Eastern Mediterranean Species. Verlag Kessel, Remagen
no DOI — not checkedAndreánszky G (1959). Die Flora der Sarmatischen Stufe in Ungarn. Akadémiai Kiadó, Budapest
no DOI — not checkedBentham G , Hooker JD (1880). Genera Plantarum, Vol. 3. L. Reeve & Co., Williams & Norgate, London
no DOI — not checkedBritton NL , Brown A (1913). An Illustrated Flora of Northern United States, Canada and British Possessions. Scribner & Sons, New York
no DOI — not checkedBrowicz K , Zieliński J (1982). Chorology of Trees and Shrubs in South-West Asia and Adjacent Regions. Polish Scientific Publishers, Warsaw, Poznan
no DOI — not checkedCamus A (1936–1938). Les Chênes. Monographie du genre Quercus . Tome I. Genre Quercus, sous-genre Cyclobalanopsis, sous-genre Euquercus (sections Cerris et Mesobalanus). Texte. Paul Lechevalier, Paris
no DOI — not checkedCamus A (1938–1939). Les Chênes. Monographie du genre Quercus . Tome II. Genre Quercus, sous-genre Euquercus (sections Lepidobalanus et Macrobalanus). Texte. Paul Lechevalier, Paris
no DOI — not checkedCamus A (1952–1954). Les Chênes: Monographie du genre Quercus . Tome III. Genre Quercus: sous-genre Euquercus (sections Protobalanus et Erythrobalanus) et genre Lithocarpus. Texte. Paul Lechevalier, Paris
no DOI — not checkedCosta Tenorio M , Morla Juarista C , Sáinz Ollero H (2001). Los bosques Ibéricos. Una interpretación geobotánica. Planeta, Barcelona
no DOI — not checkedEvolution, systematics, and fossil history of the Hamamelida
no DOI — not checkedÉtude sur l’espèce á l’occasion d’une révision de la famille des Cupulifères
no DOI — not checkedNote sur un charactère observé dans les fruits des chênes
no DOI — not checkedDeng M (2007) Anatomy, Taxonomy, Distribution and Phylogeny of Quercus Subg. Cyclobalanopsis (Oersted) Schneid. (Fagaceae). Ph.D. thesis, Kunming Institute of Botany, Chinese Academy of Sciences and Graduate School of Chinese Academy of Sciences, Beijing
no DOI — not checkedLeaf epidermal features of Quercus subgenus Cyclobalanopsis (Fagaceae) and their systematic significance
no DOI — not checkedDumortier B-C (1829). Florula Belgica. J. Casterman, Tournai
no DOI — not checkedThe acorns and their germination
no DOI — not checkedFang J , Wang Z , Tang Z (2009). Atlas of Woody Plants in China. Volumes 1 to 3 and index. Higher Education Press, Beijing
no DOI — not checkedFarr ER , Zijlstra G (2017) Index Nominum Genericorum (Plantarum). 1996+. http://botany.si.edu/ing/, last accessed 25/6/2017
no DOI — not checkedFlora of China (2016) eFloras: Flora of China. http://www.efloras.org/flora_page.aspx?flora_id=2, last accessed 02/11/2016
no DOI — not checkedFlora of North America Editorial Commitee (1997). Flora of North America north of Mexico. Vol. 3. Oxford University Press, New York
no DOI — not checkedGagnidze R , Urushadze T , Pietzarka U (2014). Quercus pontica Enzyklopädie der Holzgewächse: Handbuch und Atlas der Dendrologie 63. Erg. Lfg. 04/13. Wiley-VCH, Weinheim, p. 1–8
no DOI — not checkedGovaerts R , Frodin DG (1998). World Checklist and Bibliography of Fagales (Betulaceae, Corylaceae, Fagaceae and Ticodendraceae). Royal Botanic Gardens, Kew
no DOI — not checkedHesse M , Halbritter H , Zetter R , Weber M , Buchner R , Frosch-Radivo A , Ulrich S (2009). Pollen Terminology – an Illustrated Handbook. Springer, Wien, New York
no DOI — not checkedHipp AL , Manos P , McVay JD , Cavender-Bares J , González-Rodriguez A , Romero-Severson J , Hahn M , Brown BH , Budaitis B , Deng M , Grimm G , Fitzek E , Cronn R , Jennings TL , Avishai M , Simeone MC (2015). A phylogeny of the World’s oaks. Botany 2015, Edmonton. Available at http://2015.botanyconference.org/engine/search/index.php?func=detail&aid=1305
no DOI — not checkedHipp AL , Manos PS , González-Rodríguez A , Hahn M , Kaproth M , McVay JD , Valencia Avalos S , Cavender-Bares J (submitted) The American oaks exhibit convergent evolution in biogeography, climatic niche, and diversification rates. New Phytol
no DOI — not checkedHofmann C-C (2010). Microstructure of Fagaceae pollen from Austria (Paleocene/Eocene boundary) and Hainan Island (?middle Eocene)8th European Palaeobotany-Palynology Conference. Hungarian Natural History Museum, Budapest, p. 119
no DOI — not checkedHuang C , Zhang Y , Bartholomew B (1999) Fagaceae. In: Wu Z-Y , Raven PH (eds) Flora of China 4 Cycadaceae through Fagaceae. Science Press and Missouri Botanical Garden Press, Beijing, St. Louis, p. 314–400
no DOI — not checkedThe Miocene flora of Shimonoseki, Southwest Honshu, Japan
no DOI — not checkedMorphologisch-anatomische Studien über strukturbietende, ganzrandige Eichenblätter des Subgenus Euquercus – Quercus lusatica n. sp. – im Tertiär Mitteleuropas
no DOI — not checkedFlora of North America North of Mexico
no DOI — not checkedKmenta M (2011) Die Mikroflora der untermiozänen Fundstelle Altmittweida, Deutschland. M.Sc. thesis, University of Vienna, Vienna, Austria. http://othes.univie.ac.at/15964/
no DOI — not checkedThe plant assemblages from the main seam parting of the western sub-basin of Oberdorf, N Voitsberg, Styria, Austria (Early Miocene)
no DOI — not checkedOligotsenovaya flora gory Ashutas v Kazakhstane (Oligocene flora of Ashutas Mount in Kazakhstan)
no DOI — not checkedKvaček Z , Velitzelos D , Velitzelos E (2002). Late Miocene Flora of Vegora, Macedonia, N. Greece. Korali Publications, Athens
no DOI — not checkedle Hardÿ de Beaulieu A , Lamant T (2010). Guide illustré des Chênes. 2 vols. Edilens, Geer
no DOI — not checkedLinné Cv (1753). Species Plantarum. Vol. 2. Laurentii Salvii, Stockholm
no DOI — not checkedLoudon JC (1830). Loudon’s Hortus Brittanicus. A. & R. Spottiswoode, London
no DOI — not checkedLoudon JC (1838). Arboretum et Fruticetum Brittanicum. Vol. III. Printed for the author by A. Spottiswoode, London
no DOI — not checkedLoudon JC (1839) Part II. The Jussieuean Arrangement. In: Loudon JC (ed) Loudon’s Hortus Brittanicus A new edition. A. Spottiswode, London, p. 491–704
no DOI — not checkedMai DH (1995). Tertiäre Vegetationsgeschichte Europas. Gustav Fischer Verlag, Jena, Stuttgart, New York
no DOI — not checkedPollen morphology of the genus Quercus by scanning electron microscope
no DOI — not checkedFruits and seeds of the Middle Eocene nut beds flora, Clarno Formation, Oregon
no DOI — not checkedFoliar trichome variation in Quercus section Protobalanus (Fagaceae)
no DOI — not checkedManos PS (1997) Quercus Sect. Protobalanus (Trelease) A.Camus. In: Flora of North America Editorial Committee (ed) Flora of North America North of Mexico Vol 3. Missouri Botanical Garden Press, St. Louis, p. 468ff
no DOI — not checkedSystematics and biogeography of the American oaks
no DOI — not checkedMenitsky YL (1984). Duby Azii. Nauka, Leningrad [St. Petersburg]
no DOI — not checkedMenitsky YL (2005). Oaks of Asia [translated from the Russian original of 1984]. Science Publishers, Enfield, NH
no DOI — not checkedInterfertile oaks in an island environment: I. High nuclear genetic differentiation and high degree of chloroplast DNA sharing between Q. alnifolia and Q. coccifera in Cyprus. A multipopulation study
no DOI — not checkedNixon KC (1997) Fagaceae. In: Flora of North America Editorial Committee (ed) Flora of North America North of Mexico. Oxford University Press, New York, p. 436–537
no DOI — not checkedNixon KC (2002) The oak biodiversity of California and adjacent regions. In: Standiford RB , McCreary D , Purcell KL (eds) Proceedings of the 5th Symposium on Oak Woodlands: Oaks in California’s Changing Landscape. USDA Forest Service General Technical Report PSW-GTR-184. Pacific Southwest Research Station, San Diego,
no DOI — not checkedNixon KC , Muller CH (1997) Quercus Sect. Quercus Linneus. In: Flora of North America Editorial Committee (ed) Flora of North America North of Mexico Vol 3. Missouri Botanical Garden Press, St. Louis,
no DOI — not checkedMolecular phylogenetics and cupule evolution in Fagaceae as inferred from nuclear CRABS CLAW sequences
no DOI — not checkedOhwi J (1965). Flora of Japan (English ed., edited by F. G. Meyer and E. H. Walker ). Smithsonian Institution, Washington, D.C.
no DOI — not checkedBidrag til egeslægtens systematik
no DOI — not checkedBidrag til Kundskab om Egefamilien
no DOI — not checkedPavlyutkin BI , Chekryzhov IU , Petrenko TI (2014). Geology and floras of lower Oligocene in the Primorye. Dalnauka, Vladivostok
no DOI — not checkedRowley JR (1996) Exine origin, development and structure in pteridophytes, gymnosperms and angiosperms. In: Jansonius J , McGregor DC (eds) Palynology, Principles and Applications. American Association of Stratigraphic Palynologists Foundation, Dallas, p. 443–462
no DOI — not checkedRowley JR , Skvarla JJ , Ferguson IK , El-Gazhaly G (1979) Pollen wall fibrils lacking primary receptors for sporopollenin. In: Bailey GW
no DOI — not checked(ed) Proceedings of the 37th Annual Meeting Electron Microscopy Society of America, San Antonio, TX, August 13-17, 1979. Claitor, Baton Rouge, p. 340-341
no DOI — not checkedSchneider CK (1906). Illustriertes Handbuch der Laubholzkunde, Band 1. Gustav Fischer, Jena
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no DOI — not checkedSchwarz O (1937). Monographie der Eichen Europas und des Mittelmeergebietes. Repertorium specierum nov. regni vegetabilis, Sonderbeihefte D. Selbstverlag Friedrich Fedde, Dahlem-Berlin
no DOI — not checkedThe first occurrence of the Quercus section Cerris Spach fruits in the Miocene of China
no DOI — not checkedSpach E (1842). Histoire naturelle des végétaux. Phanerogames, vol. 11. Schneider & Langrand, Paris
no DOI — not checkedSprague TA (1929). International Botanical Congress Cambridge (England), 1930. Nomenclature Proposals by British Botanists. Wyman & Sons, London
no DOI — not checkedStandley PC (1922). Trees and Shrubs of Mexico. Contr US Natl Herb 23. Government Printing Office, Washington
no DOI — not checkedLobed oak leaves from the Tertiary of East Asia with reference to the oak phytogeography of the northern hemisphere
no DOI — not checkedTrichome types, foliar indumentum and epicuticular wax in the Mediterranean gall oaks, Quercus subsection Galliferae (Fagaceae): implications for taxonomy, ecology and evolution
no DOI — not checkedFagaceae from Sosnica and Malczyce (near Wrocłav, Poland). A revision of original materials by Goeppert 1852 and 1855 and a study of new collections
no DOI — not checkedWriting Group of Cenozoic Plants of China (WGCPC) (1978). Cenozoic Plants from China. Fossil Plants of China 3. Science Press, Beijing [in Chinese]
no DOI — not checkedPlant megafossil assemblage from the lower Miocene Ito-o Formation, Fukui Prefecture, Central Japan
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