P. Vršanský, Ľubomír Vidlička, P. Barna, E. Bugdaeva, and V. Markevich, “Paleocene origin of the cockroach families Blaberidae and Corydiidae: Evidence from Amur River region of Russia”, Zootaxa, vol. 3635, no. 2, pp. 117–126, Mar. 2013.