Susanti, Destia, et al. “Identification of Secondary Metabolite Compounds in Two Varieties of Young Winged Beans (Psophocarpus Tetragonolobus L.) at Two Harvest Ages”. Journal of Tropical Crop Science, vol. 9, no. 01, Feb. 2022, pp. 52-67, doi:10.29244/jtcs.9.01.52-67.