Ziani S., Gudenzi I., 2007: Studies on Palaearctic Onthophagus associated with burrows of small mammals. II. O. semicornis and closely related species (Coleoptera: Scarabaeidae: Onthophagini). 26 pp. [FHC252] Folia Heyrovskyana 15A(2): 89-114. ( pdf 95 CZK/4 EUR)