Honty, K., et al. “Frost Induced Changes in Enzyme Activities and Carbohydrate Content in the Spurs of Some Pear Cultivars During the Dormancy”. International Journal of Horticultural Science, vol. 14, no. 1-2., Feb. 2008, pp. 41-44., https://doi.org/10.31421/IJHS/14/1-2./780.