Reference

Massimo Meregalli, Fabrizio Menardo, Klaus-Dieter Klass, Piero Cervella (2013): Phylogeny of the Saxifraga-associated species of Dichotrachelus (Insecta: Coleoptera: Curculionidae), with remarks on their radiation in the Alps – Arthropod Systematics and Phylogeny – 71: 43 - 68.