“Performance of ‘Gala’ Apple on 18 Dwarf Rootstocks: Five-Year Summary of the 1994 NC-140 Dwarf Rootstock Trial”. Journal of the American Pomological Society, vol. 54, no. 2, Apr. 2000, pp. 92-107, https://doi.org/10.71318/apom.2000.54.2.92.