ZAJDEL, Sybilla M.; GŁOWNIAK, Kazimierz. Penstemon – a short characteristic of the genus with a special consideration of its chemical composition and a role in ethnomedicine. Current Issues in Pharmacy and Medical Sciences, Lublin, Poland, v. 24, n. 2, p. 141–146, 2012. Disponível em: https://czasopisma.umlub.pl/curipms/article/view/3015. Acesso em: 8 jun. 2025.