Ryś-Jurek, R. 2018. The Assessment of the Liquidity of Agricultural Farms in Poland on the Background of the European Union in the Years 2009-2015. Studia Oeconomica Posnaniensia. 6, 2 (Feb. 2018), 66–83. DOI:https://doi.org/10.18559/SOEP.2018.2.5.