“Rootstock Affects Ripening, Color, and Shape of ‘Starkspur Supreme Delicious’ Apples in the 1984 NC-140 Cooperative Planting”. Journal of the American Pomological Society 50, no. 1 (January 1, 1996): 45–53. Accessed May 2, 2026. https://journal.americanpomological.org/index.php/jofaps/article/view/2209.