Zili L, Zaghbib-Turki D, Alegret L, Arenillas I, Molina E. Foraminiferal turnover across the Paleocene/Eocene boundary at the Zumaya section, Spain: record of a bathyal gradual mass extinction. revmexcg [Internet]. 2014 Mar. 4 [cited 2025 Apr. 16];26(3). Available from: https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/344