GÜR, Nazmi, et al. “Acidity Effect in Pollen Germination and Tube Length of Prunus Amygdalus Batsch and Prunus Domestica L”. Journal of Applied Biological Sciences, vol. 10, no. 2, June 2019, pp. 41-45, https://www.jabsonline.org/index.php/jabs/article/view/500.