1. Hansen M. 1998: Hydraenidae (Coleoptera) Creator: Boukal, D.S. Type: article, model:article, and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
2. Nilsson A.N. & Vondel B.J. van: Amphizoidae, Aspidytidae, Haliplidae, Noteridae and Paelobiidae (Coleoptera) Creator: Boukal, D.S. Type: article, model:article, and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public