“’Gala’ Apple Trees on Supporter 4, P.14, and Different Strains of B.9, M.9 and M.26 Rootstocks: Final 10-Year Report on the 2002 NC-140 Apple Rootstock Trial”, jpom, vol. 67, no. 2, pp. 62–71, Apr. 2013, doi: 10.71318/apom.2013.67.2.62.