M. J. T. Nicolas, “Formulation and Analysis of Chinese Malunggay (Sauropus androgynus), Serpentina (Andrographis paniculata), and Stevia (Stevia rebaudiana Bertoni) Leaves Tea: Basis for Livelihood Opportunities”, Int. J. Sustain. Integr. Stud., vol. 1, no. 1, pp. 386–391, Aug. 2026, doi: 10.65339/ijsis.V1.I1.40.