Graf, W., Waringer, J. and Pauls, S. U. (2009) “A new feeding group within larval Drusinae (Trichoptera: Limnephilidae): the Drusus alpinus Group sensu Schmid, 1956, including larval descriptions of Drusus franzi Schmid, 1956, and Drusus alpinus (Meyer-Dür, 1875)”, Zootaxa. Auckland, New Zealand, 2031(1), pp. 53–62. doi: 10.11646/zootaxa.2031.1.4.