Moncayo, Shirley, et al. “Preliminary Phytochemical Screening for Antioxidant Activity and Content of Phenols and Flavonoids of 18 Species of Plants Native to Western Ecuador”. Trends in Phytochemical Research, vol. 5, no. 2, June 2021, pp. 93-104, https://oiccpress.com/tpr/article/view/11799.