Hevesi, M., Papp, J., Jámbor-Benczúr, E. and Gazdag, G. (1999) “Knot formation by Pseudomonas syringae subsp. savastanoi on the in vitro shoots of Sorbus redliana”, International Journal of Horticultural Science, 5(3-4), pp. 59–62. doi: 10.31421/IJHS/5/3-4/45.