Tonietto, Jorge, et al. “The Gibberellic Acid on Development of Seedless Berries in ’Isabel’ Grape”. Pesquisa Agropecuaria Brasileira, vol. 18, no. 4, Apr. 2014, pp. 381-6, https://doi.org/10.1590/S1678-3921.pab1983.v18.15244.