Taxon - Odkazy a literatura
Lemke U. (2019): Catalogue of the available names and non available names of the species and subspecies for the class Trilobita [jako Eomonorachus deloi Roy 1941]Datum citace: 29. únor 2020
Lemke U. (2019): Catalogue of the available names and non available names of the species and subspecies for the class Trilobita [jako Pterygometopus callicephalus brevis Roy 1941]Datum citace: 3. březen 2020
Lemke U. (2019): Catalogue of the available names and non available names of the species and subspecies for the class Trilobita [jako Calliops brevis Ulrich & Delo in Delo 1940]Datum citace: 3. březen 2020
Paleobiology Database [177370]
Paleobiology Database [https://paleobiodb.org/] [jako Calliops brevis (Roy, 1941)]
Datum citace: 1. duben 2020