@ARTICLE{Krawczyk_Agnieszka_Syrphids_2011, author={Krawczyk, Agnieszka and Hurej, Michał and Jackowski, Jacek}, volume={vol. 51}, number={No 1}, journal={Journal of Plant Protection Research}, howpublished={online}, year={2011}, publisher={Committee of Plant Protection PAS}, publisher={Institute of Plant Protection – National Research Institute}, title={Syrphids and Their Parasitoids from Maize Crop}, URL={http://journals.pan.pl/Content/88335/PDF/JPPR_51(1)_17_Krawczyk.pdf}, doi={10.2478/v10045-011-0017-9}, }