HONĚK, Alois, Zdena MARTINKOVÁ a
Stanislav PEKÁR. Aggregation characteristics of three species of Coccinellidae (Coleoptera) at hibernation sites.
Eur. J. Entomol. České Budějovice: Czech Academy of Sciences, 2007, roč. 104, č. 1, s. 51-56. ISSN 1210-5759.