D. Rocha Ramos Barbosa, D. Rakeli Simão Boyarski, T. Fernandes Santana de Macena, and R. Castilho Clemente, “Quantification of phenolic compounds, antioxidant power and sugar content in commercial products based on Hibiscus sabdariffa L”., DRIUFT, vol. 7, no. 2, pp. 108–123, Apr. 2020.