R. W. Garrison, K.-D. B. Dijkstra, M. Hämäläinen, and R. J. T. Villanueva, “Mitragomphus ganzanus Needham, 1944, a geographically misplaced dragonfly, is a junior synonym of Gomphidia kirschii Selys, 1878 (Odonata: Gomphidae)”, Zootaxa, vol. 3911, no. 2, pp. 280–286, Jan. 2015.