Cytotoxic and antiviral activities of the essential oils from Tunisian fern, Osmunda regalis - Bouazzi, S; Jmii, H; El Mokni, R; Faidi, K; Falconieri, D; Piras, A; Jaïdane, H; Porcedda, S; Hammami, S (S Afr J Bot, 2018)