Reference health
Archaeopteryx -like skull in Enantiornithine bird
1/1 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 1 checked reference that resolves
The 9 references without a DOI — listed, not checked
no DOI — not checkedHou, L., Martin, L. D., Zhou, Z. & Feduccia, A. Science 274, 1164–1167 (1996).
no DOI — not checkedMartin, L. D. in Origin of the Higher Groups of Tetrapods (eds Schultze, H. P. & Trueb, L.) 485-540 (Comstock, Ithaca, 1991).
no DOI — not checkedMartin, L. D. Cour. Forschungsinst. Senckenberg 181, 23–36 (1995).
no DOI — not checkedFeduccia, A. The Origin and Evolution of Birds (Yale Univ. Press, New Haven, 1996).
no DOI — not checkedElzanowski, A. Paleontol. Polon. 42, 147–179 (1981).
no DOI — not checkedZhou, Z. Cour. Forschungsinst. Senckenberg 181, 9–22 (1995).
no DOI — not checkedZhou, Z., Jin, F. & Zhang, J. Chinese Sci. Bull. 37, 1365–1368 (1992).
no DOI — not checkedWellnhofer, P. Archaeopteryx 11, 1–47 (1993).
no DOI — not checkedElzanowski, A. & Wellnhofer, P. J. Vert. Paleontol. 16, 81–94 (1996).
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
Embed this badge
Both snippets point at the live badge image and link back to this page. The badge re-renders from the daily check, so an embed never goes stale by more than a day of visits.
<a href="https://citestamp.com/citestamped/10.1038/39228"><img src="https://citestamp.com/citestamped/10.1038/39228/badge.svg" alt="CiteStamped reference-health badge" width="460" height="64"></a>
[](https://citestamp.com/citestamped/10.1038/39228)