Z. Orosz-Kovács, A. Farkas, T. Bubán, P. Bukovics, E. Nagy Tóth, and H. Déri, “Floral biological investigations of apple cultivars in relation to fire blight”, Int. j. hortic. sci., vol. 10, no. 2, pp. 9–14., May 2004, doi: 10.31421/IJHS/10/2/454.