Reference health
Biostratigraphical dating of the early history of the South Atlantic Ocean
2/2 checkable references clean · checked 2026-07-21
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 retraction, withdrawal, or removal notice.
7 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 2 checked references that resolve
The 7 references without a DOI — listed, not checked
no DOI — not checkedAllard G. O. & Tibana P. 1 9 6 6 Extensao Pre-Cretacea e Petrografia da Serie Estancia. BoIn tec. 9 35-45.
no DOI — not checkedAlmeida F. F. M. de & Black R. 1 9 6 6 Comparaison structurale entre le N.E. de Bresil et l'ouest africain. In preparation.
no DOI — not checkedBarber W. M. 1 9 5 7 Lower Turonian ammonites from northeastern Nigeria. Bull. geol. Surv. Nigeria 26 8 6 pp. pis.
no DOI — not checkedBarber W. M. 1 9 5 8 Upper Cretaceous Mollusca from northeastern Nigeria. Rec. geol. Surv. Nigeria (1956) pp. 14-37 pis.
no DOI — not checkedBelmonte Y. Hirtz P. & Wenger R. 1 9 6 5 The salt basins of the Gabon and the Congo (Brazzaville): a tentative palaeogeographic interpretation. In Salt basins around Africa. London: Institute of Petroleum.
no DOI — not checkedCretaceous system in Northern Peru. Bull. Am. Mus. nat
no DOI — not checkedBeurlen G. 1 9 6 8 A fauna do complexo Riachuelo/Maruim. Boln tec.
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