Reference health
A New Species of <i>Cathayornis</i> from the Lower Cretaceous of Inner Mongolia, China and Its Stratigraphic Significance
16/16 checkable references clean · checked 2026-07-14
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a publisher retraction, withdrawal, or removal notice.
18 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 16 checked references that resolve
resolves10.1029/2004GL019790
Timing of the Jiufotang Formation (Jehol Group) in Liaoning, northeastern China, and its implications
resolves10.1007/s00114-003-0489-1
New Early Cretaceous fossil from China documents a novel trophic specialization for Mesozoic birds
resolves10.1111/j.1755-6724.2006.tb00792.x
New Eoenantiornithid Bird from the Early Cretaceous Jiufotang Formation of Western Liaoning, China
resolves10.1139/e04-055
Description of a new enantiornithine bird from the Early Cretaceous of Hebei, northern China
resolves10.1111/j.1755-6724.2007.tb00960.x
Precious Fossil‐Bearing Beds of the Lower Cretaceous Jiufotang Formation in Western Liaoning Province, China
resolves10.1111/j.1755-6724.2007.tb00995.x
A New Enantiornitine Bird with Four Long Rectrices from the Early Cretaceous of Northern Hebei, China
resolves10.1139/e05-038
Anatomy of the Early Cretaceous bird <i>Eoenantiornis buhleri</i> (Aves: Enantiornithes) from China
resolves10.1671/0272-4634(2002)022[0049:ANAPEB]2.0.CO;2
A new and primitive enantiornithine bird from the Early Cretaceous of China
resolves10.1007/s00114-004-0570-4
The origin and early evolution of birds: discoveries, disputes, and perspectives from fossil evidence
resolves10.1002/gj.1045
Evolutionary radiation of the Jehol Biota: chronological and ecological perspectives
The 18 references without a DOI — listed, not checked
no DOI — not checkedBiostratigraphy of China
no DOI — not checkedRelative problems concerning the Lower Cretaceous Stratigraphic division of the Dongsheng area on the Northeastern margin of the Ordos Basin
no DOI — not checkedMesozoic birds above the heads of dinosaurs
no DOI — not checkedThe Origin and Evolution of Birds
no DOI — not checkedAn Evolution on Dinosaurs and Cretaceous Distribution of Inner Mongolia
no DOI — not checkedThe 40Ar/39Ar dating of the early Jehol Biota from Fengning, Hebei Province, northern China
no DOI — not checkedNew Perspectives on the Origin and Early Evolution of Birds
no DOI — not checkedA late Mesozoic bird from Inner Mongolia
no DOI — not checkedMesozoic Birds of China.
no DOI — not checkedArchaeopteryx to opposite birds—missing link from the Mesozoic of China
no DOI — not checkedA new type of dinosaur tracks from Lower Cretaceous of Chabu, Otog Qi, Inner Mongolia
no DOI — not checkedReport on Survey of geological and mineral resources in Otog Qi, Qiahanzhuo, Brag, New Street, and Wushen Qi
no DOI — not checkedFurther Support for a Cretaceous age for the feathered‐dinosaur beds of Liaoning, China: New 40Ar/39 dating of the Yixian and Tuchengzi Formations
no DOI — not checkedCharacteristics and correlation of the Early Cretaceous strata in the Northern Ordos Basin
no DOI — not checkedMesozoic birds of China ‐ a synoptic review
no DOI — not checkedMesozoic birds above the head of dinosaurs
no DOI — not checkedPreliminary report on a Mesozoic bird from Liaoning, China
no DOI — not checkedThe discovery of Early Cretaceous birds in China
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work were clean at the dated check: each resolved to a known work in a public registry, and none
carried a publisher retraction notice at that time. It says nothing about the quality, findings,
or importance of the work itself, and nothing about references deposited without a DOI.
checked 2026-07-14 — re-checked daily as this page is visited; titles and statuses come from Crossref and DataCite and are not part of the signed record
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