Gómez-Luna, María Eugenia, and Ángel Martínez-Cortés. “Relationships and Differences Between the Triassic Ammonoid Successions of Northwestem Sonora, Mexico, and West-Central Nevada, U.S.A”. Revista Mexicana De Ciencias Geológicas, vol. 14, no. 2, Jan. 2019, pp. 208-1, https://rmcg.unam.mx/index.php/rmcg/article/view/1141.