Gazzola, R., & de Souza, M. (1994). Foliar fertilization and thinning of Ponkan tangerine trees (Citrus reticulata Blanco) on the quality of the fruits. Pesquisa Agropecuaria Brasileira, 29(5), 785-790. https://doi.org/10.1590/S1678-3921.pab1994.v29.4116