Kononenko, V.S., Volynkin, A.V. & 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, 3590 (1), 51–62.
https://doi.org/10.11646/zootaxa.3590.1.5