Pető, Judit, Imre Cserni, and Attila Hüvely. 2013. “Effects of Soil Types and Nitrogen Fertilizer Doses on Some Chemical Characteristics of Tomato, Sweet Corn and Pepper”. Review on Agriculture and Rural Development 2 (2):550-55. https://ojs.bibl.u-szeged.hu/index.php/rard/article/view/13376.