NICOLAS, M. J. T. Formulation and Analysis of Chinese Malunggay (Sauropus androgynus), Serpentina (Andrographis paniculata), and Stevia (Stevia rebaudiana Bertoni) Leaves Tea: Basis for Livelihood Opportunities. International Journal of Sustainable and Integrated Studies, v. 1, n. 1, p. 386–391, 25 Aug.2026.