"The Cephalopoda". ucmp.berkeley.edu. Archived from the original on March 24, 2022. Retrieved September 24, 2019.
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Nishiguchi, M.K.; R. Mapes (2008). "Cephalopoda"(PDF). University of California Press. pp. 163–199. Archived(PDF) from the original on 2022-09-23. Retrieved 2022-09-23.
Klug, Christian; Kröger, Björn; Vinther, Jakob; Fuchs, Dirk (August 2015). "Ancestry, Origin and Early Evolution of Ammonoids". In Christian Klug; Dieter Korn; Kenneth De Baets; Isabelle Kruta; Royal H. Mapes (eds.). Ammonoid Paleobiology: From macroevolution to paleogeography. Topics in Geobiology 44. Vol. 44. Springer. pp. 3–24. doi:10.1007/978-94-017-9633-0_1. ISBN978-94-017-9632-3.
Sarti, Carlo (1999). "Whorl Width in the Body Chamber of Ammonites as a Sign of Dimorphism". Advancing Research on Living and Fossil Cephalopods. pp. 315–332. doi:10.1007/978-1-4615-4837-9_23. ISBN978-1-4613-7193-9.
Rowe, Alison J.; Landman, Neil H.; Cochran, J. Kirk; Witts, James D.; Garb, Matthew P. (26 March 2020). "Late Cretaceous Methane Seeps as Habitats for Newly Hatched Ammonites". PALAIOS. 35 (3): 151–163. Bibcode:2020Palai..35..151R. doi:10.2110/palo.2019.105. S2CID214718487.
Rowe, Alison J.; Landman, Neil H.; Cochran, J. Kirk; Witts, James D.; Garb, Matthew P. (26 March 2020). "Late Cretaceous Methane Seeps as Habitats for Newly Hatched Ammonites". PALAIOS. 35 (3): 151–163. Bibcode:2020Palai..35..151R. doi:10.2110/palo.2019.105. S2CID214718487.
Rowe, Alison J.; Landman, Neil H.; Cochran, J. Kirk; Witts, James D.; Garb, Matthew P. (26 March 2020). "Late Cretaceous Methane Seeps as Habitats for Newly Hatched Ammonites". PALAIOS. 35 (3): 151–163. Bibcode:2020Palai..35..151R. doi:10.2110/palo.2019.105. S2CID214718487.
Nishiguchi, M.K.; R. Mapes (2008). "Cephalopoda"(PDF). University of California Press. pp. 163–199. Archived(PDF) from the original on 2022-09-23. Retrieved 2022-09-23.