BioStor
 | Letters from the Southwest. Insect fauna in the burrows of desert rodents Hubbard Henry Guernsey (1901) Proceedings of the Entomological Society of Washington 4: 361-364 |
 | A systematic revision and the evolutionary biology of the Ptomaphagus (Adelops) beetles of North America (Coleoptera; Leiodidae; Catopinae), with emphasis on cave-inhabiting species S B Peck (1973) Bulletin of The Museum of Comparative Zoology 145: 29-162 |