J. Racskó, S. Thurzó, and G. Drén, “Effect of M9, MM106 and Seedling Rootstocks on Sunburn-Sensitivity of 33 Apple Cultivars, and Sunburn Effects on Fruit Quality”, Acta agrar. Debr., no. 16, pp. 236–247, Dec. 2005, doi: 10.34101/actaagrar/16/3316.