J. M. Morales, R. H. Blas, V. P. Chiluisa-Utreras, J. N. Flores, and G. D. Ortega, “Gene Expression of Flavanone 3-Hydroxylase (F3H), Anthocyanidin Synthase (ANS), and p-Coumaroyl Ester 3-Hydroxilase (C3H) in Tzimbalo Fruit”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 11, no. 2, pp. 805–813, Apr. 2021.