Reference
Andrew Wakeham-Dawson, Predrag Jaksic, Jeremy D. Holloway, Roger L.H. Dennis (2004): Multivariate analysis of male genital structures in the Hipparchia semele-muelleri-delattini complex (Nymphalidae, Satyrinae) from the Balkans: how many taxa? – Nota lepidopterologica – 27: 103 - 124.