Safina, G. F., Tikhonova, N. G., Verzhuk, V. G., & Shubin, N. A. (2005). Storage Influence of Apple and Cherry Pollen at Low and Ultralow Temperatures on Its Viability. Problems of Cryobiology and Cryomedicine, 15(4), 671–675. Retrieved from https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/1217