Kowalczyk, J. and Szczepko, K. (2008) “Contribution to the knowledge of Aculeata сhymenoptea) of łódzkie voivodeship”, Acta Universitatis Lodziensis. Folia Biologica et Oecologica, 4, pp. 147–166. doi: 10.18778/1730-2366.04.10.