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 Proasaphiscus quadratus Wu & Lin in Zhang et al. 1980]Datum citace: 28. únor 2020
Paleobiology Database [227130]
Paleobiology Database [https://paleobiodb.org/] [jako Proasaphiscus quadratus Zhang, Lin, Wu & Yuan, 1980]
Datum citace: 11. prosinec 2015