BioStor
 | A monographic revision of the Mexican water beetles of the family Elmidae (1940) Novitates Zoologicae 42: 217-396 |
 | The Discovery Of Hydora, A Hitherto Australian new-Zealand Genus Of Riffle Beetles, In Austral South america (Coleoptera, Elmidae) P J Spangler and H P Brown (1981) Proceedings of The Entomological Society of Washington 83: 596-606 |