Vierbergen, G. 2015: In memoriam: Richard zur Strassen World taxonomist in Thysanoptera (*20-xi-1926 – †31-x-2013). - Beiträge Zur Entomologie = Contributions to Entomology 65(2): 197–208 - doi: 10.21248/contrib.entomol.65.2.197-208