J. Felföldi, T. Szabó, J. Nyéki, Z. Szabó, M. Soltész, and F. Apáti, “Evaluation of sour cherry varieties grown with environmental technology”, Int. j. hortic. sci., vol. 16, no. 3, pp. 39–41., May 2010, doi: 10.31421/IJHS/16/3/893.