Reference health
Two new ornithurine birds from the Early Cretaceous of western Liaoning, China
6/6 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.
9 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 6 checked references that resolve
resolves10.1126/science.255.5046.845
Early Evolution of Avian Flight and Perching: New Evidence from the Lower Cretaceous of China
resolves10.1126/science.274.5290.1164
Early Adaptive Radiation of Birds: Evidence from Fossils from Northeastern China
resolves10.1016/0195-6671(85)90050-3
A true carinate bird from lower Cretaceous deposits in Mongolia and other evidence of early Cretaceous birds in Asia
The 9 references without a DOI — listed, not checked
no DOI — not checkedZhou, Z. F., Jin, F., Zhang, J., Preliminary report on a Mesozoic bird from Liaoning, China, Chinese Sci. Bull. (in Chinese), 1992, 37(16): 1365.
no DOI — not checkedZhou, Z., Discovery of a new enantiornithine bird from the Early Cretaceous of Liaoning, China, Vert PalAsiat (in Chinese), 1995, 33(2): 99.
no DOI — not checkedHou, L. H., Martin, L. D., Zhou, Z. H. et al.,Archaeopteryx to opposite birds-missing link from the Mesozoic of China, Vert PalAsiat (in Chinese), 1999, 37(2): 88.
no DOI — not checkedZhang, F., Zhou, Z., Hou, L. et al., Early radiation of birds—evidence from a new enantiornithine, Chinese Sci. Bull. (in Chinese), 2000, 45(24): 2650.
no DOI — not checkedHou, L., Liu, Z., A new fossil bird from Lower Cretaceous of Gansu and early evolution of birds, Sci. Sin. Ser. B, 1984, 27(12): 1296.
no DOI — not checkedHou, L., Zhang, J., A new fossil bird from Lower Cretaceous of China, Vert PalAsiat (in Chinese), 1993, 31(3): 217.
no DOI — not checkedHou, L., Mesozoic birds of China, Nantou: Feng-Huang-Ku Bird Park of Taiwan Provincial Government (in Chinese), 1997, 1–228.
no DOI — not checkedFeduccia, A., The Origin and Evolution of Birds, New Haven: Yale Univ. Press, 1999, 1–466.
no DOI — not checkedZhou, Z., Hou, L.,Confuciusornis and the early evolution of birds, Vert PalAsiat (in Chinese), 1998, 36(2): 136.
What this badge says. CiteStamped means the CHECKABLE references of this
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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