BioStor
 | Synopsis of the Silphidae of the United States, with reference to the genera of other countries (1880) Transactions of The American Entomological Society 8: 219-321 |
 | List of the Coleoptera of southern California with notes on habits and descriptions of new species Fall Henry Clinton (1901) Occasional Papers of the California Academy of Sciences, San Francisco 8: 1-282 |
 | 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 |
 | Current classification and family-group names in Staphyliniformia (Coleoptera) (1992) Fieldiana Zoology 67: 1-92 |