Hevesi, M., J. Papp, E. Jámbor-Benczúr, and G. Gazdag. “Knot Formation by Pseudomonas Syringae Subsp. Savastanoi on the in Vitro Shoots of Sorbus Redliana”. International Journal of Horticultural Science, vol. 5, no. 3-4, Sept. 1999, pp. 59-62., doi:10.31421/IJHS/5/3-4/45.