Polereczki, Zsolt, Hajnalka Roznik, Gábor Szabó, and Zoltán Szakály. 2005. “Analysis of the Groceries from Different Point of Wiev on the South Transdanubian Region With Mystery Shopping Method”. Acta Agraria Kaposváriensis 9 (1): 107-22. https://journal.uni-mate.hu/index.php/aak/article/view/1740.