M. A. C. de Lima, R. E. Alves, and H. A. Cunha Filgueiras, “Changes related to softening of soursop during postharvest maturation”, PAB, vol. 41, no. 12, pp. 1707–1713, Dec. 2006, doi: 10.1590/S1678-3921.pab2006.v41.7336.