“Horticultural Characteristics of ‘Starkspur Supreme Delicious’ Apple on 15 Rootstocks at 24 Sites”. Journal of the American Pomological Society 50, no. 1 (January 1, 1996): 18–24. Accessed December 14, 2025. https://journal.americanpomological.org/index.php/jofaps/article/view/2201.