Burdfield-Steel & Shuker, 2014 (evolutionary ecology); Judd, 1994a, 1994b (nymphal taxonomy); Pericart, 1999a, 1999b, 1999c (monogr. W Palaearctic spp.); V.G. Putshkov, 1969a (Ukraine); J.A. Slater, 1964a (world cat.); J.A. Slater & O'Donnell, 1995 (suppl. world cat.); Stichel, 1958c (monogr., Europe); Zheng & Zou, 1981a (China);
Checklist: Yoon & Cheong, 2012 (Korea).