Paula, Miralda Bueno de, et al. “Nutritional Requirement of Pineapple: Effect of Liming, Potassium and Nitrogen on Yield and Quality of Fruit”. Pesquisa Agropecuaria Brasileira, vol. 26, no. 9, Sept. 1991, pp. 1337-43, doi:10.1590/S1678-3921.pab1991.v26.3473.