Pasqual, Moacir, José Petri, and Adilson José Pereira. 2014. “Pollination of the Apple Tree. II. Cultivars Starkrimson, Blackjon and Hawaii”. Pesquisa Agropecuaria Brasileira 16 (3):431-37. https://doi.org/10.1590/S1678-3921.pab1981.v16.16954.