Marinho, C.S. et al. 1993. Influence of thinning and foliar fertilization of "Pon Kan" tangerine trees (<i>Citrus reticulata</i> blanco) on the quality of the fruits. Pesquisa Agropecuaria Brasileira. 28, 9 (Sep. 1993), 1019–1023. DOI:https://doi.org/10.1590/S1678-3921.pab1993.v28.3965.