“‘Sooyoung’: A Mid-Season Pear ( Pyrus PyrifoliaNakai) Cultivar With High Soluble Solids and Medium Size”. Journal of the American Pomological Society 61, no. 4 (October 1, 2007): 170–173. Accessed December 8, 2025. https://journal.americanpomological.org/index.php/jofaps/article/view/2679.