Pawlikowski, T., & Pawlikowski, K. (2009). PHENOLOGY OF SOCIAL WASPS (HYMENOPTERA: VESPINAE) IN THE KUJAWY REGION (NORTHERN POLAND) UNDER THE INFLUENCE OF CLIMATIC CHANGES 1981–2000. Bulletin of Geography. Physical Geography Series, (1), 125–134. https://doi.org/10.2478/2314