Kołodziejczak, Anna, and Roman Rudnicki. “SPATIAL DIVERSIFICATION OF ENERGY CROPS IN POLISH AGRICULTURE: A STUDY OF PLANTATION CONCENTRATION BASED ON LOCAL INDICATORS OF SPATIAL ASSOCIATION (LISA)”. Quaestiones Geographicae, vol. 36, no. 2, June 2017, pp. 49-56, doi:10.2478/quageo-2017-0014.