“Needs Assessment for Future US Pear Rootstock Research Directions Based on the Current State of Pear Production and Rootstock Research”. Journal of the American Pomological Society 66, no. 3 (July 1, 2012): 153–163. Accessed February 2, 2026. https://journal.americanpomological.org/index.php/jofaps/article/view/2800.