Erdős, Adél Dorottya, and László Szőllősi. “The Profitability Analyses of Crop Production Enterprises in Hajdú-Bihar County, Especially in Hajdúböszörmény”. Studia Mundi – Economica, vol. 8, no. 3, Sept. 2021, pp. 31-45, https://doi.org/10.18531/Studia.Mundi.2021.08.03.31-45.