Nadolski, J. 2013. Factors restricting the abundance of wasp colonies of the European hornet <i>Vespa crabro</i> and the Saxon wasp <i>Dolichovespula saxonica</i> (Hymenoptera: Vespidae) in an urban area in Poland. Entomologica Fennica. 24, 4 (Dec. 2013), 204–215. DOI:https://doi.org/10.33338/ef.9383.