“Performance of Plum Rootstocks With ‘Stanley’, ‘Valor’, and ‘Veeblue’ As the Scion in the 1990 NC-140 Multi-Site Plum Trial”. Journal of the American Pomological Society 61, no. 4 (October 1, 2007): 196–207. Accessed February 15, 2026. https://journal.americanpomological.org/index.php/jofaps/article/view/2676.