Total phenolic and flavonoids contents and in vitro evaluation of antioxidant activity of several Calendula officinalis (Marigold) extracts . Journal of Biological Research - Bollettino della Società Italiana di Biologia Sperimentale, [S. l.], v. 94, n. 1, 2021. DOI: 10.4081/jbr.2021.9680. Disponível em: https://www.pagepressjournals.org/jbr/article/view/9680. Acesso em: 17 apr. 2026.