Morales, Juan M., et al. “Gene Expression of Flavanone 3-Hydroxylase (F3H), Anthocyanidin Synthase (ANS), and P-Coumaroyl Ester 3-Hydroxilase (C3H) in Tzimbalo Fruit”. International Journal on Advanced Science, Engineering and Information Technology, vol. 11, no. 2, Apr. 2021, pp. 805-13, doi:10.18517/ijaseit.11.2.13681.