Ebert, Andreas, and Carlos Leomar Kreuz. “Hand Thinning and Chemical Thinning in the Apple Varieties Gala, Goldon Delicious and Fuji”. Pesquisa Agropecuaria Brasileira, vol. 23, no. 10, Apr. 2014, pp. 1115-23, doi:10.1590/S1678-3921.pab1988.v23.14049.