BLAU, Joachim; MEISTER, Christian; SCHMIDT-EFFING, Reinhard; VILLASEÑOR, Ana B. A new fossiliferous site of Lower Liassic (Upper Sinemurian) marine sediments from the southern Sierra Madre Oriental (Puebla, Mexico): ammonite fauna, biostratigraphy, and description of Ectocentrites hillebrandti new species. Revista Mexicana de Ciencias Geológicas, [S. l.], v. 25, n. 3, p. 402–407, 2018. Disponível em: https://rmcg.unam.mx/index.php/rmcg/article/view/683. Acesso em: 15 mar. 2025.