Z. Orosz-Kovács, G. L. Szabó, T. Bubán, F. Á., and P. Bukovics, “Sugar composition of floral nectar in sour cherry cultivars”, Int. j. hortic. sci., vol. 6, no. 3, pp. 109–113., Jun. 2000, doi: 10.31421/IJHS/6/3/111.