Sánchez Nieva, F., I. Hernández, and L. M. Iguina de George. “Frozen Soursop Puree”. The Journal of Agriculture of the University of Puerto Rico 54, no. 2 (April 1, 1970): 220–236. Accessed March 29, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/11088.