G. Tóth, M., S. Kovács, and Z. D. Rozsnyay. “Scab Resistance in Malus Sp. Progenies - Inheritance and Resistance Stability”. International Journal of Horticultural Science, vol. 9, no. 1, Apr. 2003, pp. 9-15., doi:10.31421/IJHS/9/1/368.