SINGTONGRATANA, N.; VADHANASIN, S.; SINGKHONRAT, J. Hydroxychavicol and Eugenol Profiling of Betel Leaves from Piper betle L. Obtained by Liquid-Liquid Extraction and Supercritical Fluid Extraction. Agriculture and Natural Resources, Bangkok, Thailand, v. 47, n. 4, p. 614–623, 2013. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/243103. Acesso em: 17 sep. 2026.