Carvalho, Almy Junior Cordeiro de, et al. “Nitrogen Fertilization and Irrigation Depths in Yellow Passionfruit. I. Yield and Fruit Quality”. Pesquisa Agropecuaria Brasileira, vol. 35, no. 6, June 2000, pp. 1101-8, doi:10.1590/S1678-3921.pab2000.v35.5881.