Nagmy, H., Rovny, P. i Zuravlovs, A. (2012) „Assessment of the Slovak and Latvian Agriculture from the Point of Plant Production”, Zeszyty Naukowe SGGW, Polityki Europejskie, Finanse i Marketing, (7(56), s. 109–119. doi: 10.22630/PEFIM.2012.7.56.12.