Alani-Pavon et al. 2025 - Permian Ammonoids from the Guadalupian (Wordian–Capitanian) of Las Delicias, Coahuila state, Mexico new biostratigraphical and paleobiogeographical insight

Davis 1972 - Mature modification and dimorphism in selected Late Paleozoic Ammonoids

Miller and Furnish 1940 - Permian Ammonoids of the Guadalupe Mountain region and adjacent areas

Miller and Youngquist 1947 - Lower Permian cephalopods from the Texas Colorado river valley

Miller and Youngquist 1949 - American Permian Nautiloids

Nassichuk, Furnish and Glenister 1965 -The Permian Ammonoids of arctic Canada

Spencer et al. 2014 - Nautiloids from the Early Permian Yeso Group, Otero County, New Mexico