Lachowska, D., Rożek, M. and Holecovà, M. (2009) “Chromosomal similarities and differences among three sibling species of the Acalles echinatus group (Coleoptera, Curculionidae, Cryptorhynchinae)”, Zootaxa. Auckland, New Zealand, 1985(1), pp. 63–68. doi: 10.11646/zootaxa.1985.1.7.