Kononenko, V. S., Volynkin, A. V. and Matov, A. Y. (2012) “A revision of the Xestia (Radddea) alexis (Kozhanchikov, 1928) species-group with a checklist of subgenus Raddea Alphéraky, 1892 and description of brachipterous females (Lepidoptera, Noctuidae, Noctuinae)”, Zootaxa. Auckland, New Zealand, 3590(1), pp. 51–62. doi: 10.11646/zootaxa.3590.1.5.