Krause, Willian, et al. “Productivity and Fruit Quality of Yellow Passion Fruit Cultivars With or Without Artificial Pollination”. Pesquisa Agropecuaria Brasileira, vol. 47, no. 12, Jan. 2013, pp. 1737-42, doi:10.1590/S1678-3921.pab2012.v47.12266.