Kiss, I., et al. “The in Vitro and in Vivo Anatomical Structure of Leaves of Prunus X Davidopersica ‘Piroska’ and Sorbus Rotundifolia L. ‘Bükk szépe’”. International Journal of Horticultural Science, vol. 5, no. 1-2, May 1999, pp. 92-95., https://doi.org/10.31421/IJHS/5/1-2/32.