Churkin, S.V., Lekarev, G.A. and Krupitsky, A.V. 2025. First record of the Plebejus christophi (Staudinger, 1874) species group in Europe with description of a new subspecies (Lepidoptera, Lycaenidae). Zootaxa. 5693, 2 (Sep. 2025), 283–290. DOI:https://doi.org/10.11646/zootaxa.5693.2.9.