Teichert, Curt; Kummel, Bernhard (20 December 1960). "Size of Endocerid Cephalopods". Breviora. 128: 1–7. Archived from the original on 8 April 2017. Retrieved 25 October 2023.
Kröger, Björn; Aubrechtová, Martina (2019). "The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity". Journal of Systematic Palaeontology. 17 (12): 961–995. Bibcode:2019JSPal..17..961K. doi:10.1080/14772019.2018.1491899. hdl:10138/308819. S2CID92845570.
Kröger, Björn; Aubrechtová, Martina (2019). "The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity". Journal of Systematic Palaeontology. 17 (12): 961–995. Bibcode:2019JSPal..17..961K. doi:10.1080/14772019.2018.1491899. hdl:10138/308819. S2CID92845570.
Kröger, Björn; Aubrechtová, Martina (2019). "The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity". Journal of Systematic Palaeontology. 17 (12): 961–995. Bibcode:2019JSPal..17..961K. doi:10.1080/14772019.2018.1491899. hdl:10138/308819. S2CID92845570.
Flower, Rousseau H. (1955). "Status of Endoceroid Classification". Journal of Paleontology. 29 (3): 329–371. ISSN0022-3360. JSTOR1300321.
Stauffer, Clinton R. (1937). "A Diminutive Fauna from the Shakopee Dolomite (Ordovician) at Cannon Falls, Minnesota". Journal of Paleontology. 11 (1): 55–60. ISSN0022-3360. JSTOR1298311.
Stauffer, Clinton R. (1937). "Mollusca from the Shakopee Dolomite (Ordovician) at Stillwater, Minnesota". Journal of Paleontology. 11 (1): 61–68. ISSN0022-3360. JSTOR1298312.
Ulrich, E.O.; Foerste, Aug F.; Bridge, J. "Chapter VI. Systematic Paleontology"(PDF). In Bridge, Josiah (ed.). Geology of the Eminence and Cardareva Quadrangles. Rolla: Missouri Bureau of Geology and Mines. pp. 186–222. Archived(PDF) from the original on 2023-10-25. Retrieved 2023-10-25.
Kröger, Björn; Aubrechtová, Martina (2019). "The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity". Journal of Systematic Palaeontology. 17 (12): 961–995. Bibcode:2019JSPal..17..961K. doi:10.1080/14772019.2018.1491899. hdl:10138/308819. S2CID92845570.
Teichert, Curt; Kummel, Bernhard (20 December 1960). "Size of Endocerid Cephalopods". Breviora. 128: 1–7. Archived from the original on 8 April 2017. Retrieved 25 October 2023.
Ulrich, E.O.; Foerste, Aug F.; Bridge, J. "Chapter VI. Systematic Paleontology"(PDF). In Bridge, Josiah (ed.). Geology of the Eminence and Cardareva Quadrangles. Rolla: Missouri Bureau of Geology and Mines. pp. 186–222. Archived(PDF) from the original on 2023-10-25. Retrieved 2023-10-25.
Stauffer, Clinton R. (1937). "A Diminutive Fauna from the Shakopee Dolomite (Ordovician) at Cannon Falls, Minnesota". Journal of Paleontology. 11 (1): 55–60. ISSN0022-3360. JSTOR1298311.
Stauffer, Clinton R. (1937). "Mollusca from the Shakopee Dolomite (Ordovician) at Stillwater, Minnesota". Journal of Paleontology. 11 (1): 61–68. ISSN0022-3360. JSTOR1298312.