Template:Hershler et al., 2013
- Hershler, R.; Liu, H.-P.; Bradford, C. 2013: Systematics of a widely distributed western North American springsnail, Pyrgulopsis micrococcus (Caenogastropoda, Hydrobiidae), with descriptions of three new congeners. ZooKeys 330: 27–52. DOI: 10.3897/zookeys.330.5852