MichaelM.HansenMichaelM., The Hydrophiloid Beetles. Phylogeny, Classification and a Revision of the Genera (Coleoptera, Hydrophiloidea). Biologiske Skrifter No. 40, „Insect Systematics & Evolution”, 3, 23, Copenhagen: The Royal Danish Academy of Sciences and Letters & Munksgaard, 1991, DOI: 10.1163/187631292X00164, ISSN1876-312X.
doi.org
Aleš Smetana. Revision of the subfamily Helophorinae of the Nearctic Region (Coleoptera: Hydrophilidae). „The Memoirs of the Entomological Society of Canada”. 117, Supplement S131, s. 3-154, 1985. Entomological Society of Canada. DOI: 10.4039/entm117131fv.
worldcat.org
MichaelM.HansenMichaelM., The Hydrophiloid Beetles. Phylogeny, Classification and a Revision of the Genera (Coleoptera, Hydrophiloidea). Biologiske Skrifter No. 40, „Insect Systematics & Evolution”, 3, 23, Copenhagen: The Royal Danish Academy of Sciences and Letters & Munksgaard, 1991, DOI: 10.1163/187631292X00164, ISSN1876-312X.