Pasqual, M., Petri, J. L., & Pereira, A. J. (2014). Pollination on the apple tree IV. Cultivars Willie Sharp, Granny Smith and Delcon. Pesquisa Agropecuaria Brasileira, 18(10), 1109–1115. https://doi.org/10.1590/S1678-3921.pab1983.v18.15435