J. Halász, A. Kurilla, and A. Hegedűs, “Preliminary characterization of the self-incompatibility genotypes of European plum (Prunus domestica L.) cultivars”, Int. j. hortic. sci., vol. 20, no. 3-4, pp. 23–26., Sep. 2014, doi: 10.31421/IJHS/20/3-4/1128.