¹Bachert C et al. Poster: Multicentre, randomised, double-blind, placebo-controlled parallel-group dose-finding study of herbal medicine (dry extract) BNO-1016 in acute rhinosinusitis. 84th Annual Meeting of the German Society of Oto-Rhino-Laryngology, Head and Neck Surgery, Nornberg 2013.

²Jund R et al. Clinical efficacy of a dry extract of five herbal drugs in acute viral rhinosinusitis. Rhinology 2012; 50(4): 417-426.

³Neubauer, März Placebo-controlled, randomized, double-blind clinical trial with Sinupret sugar-coated tablets on the basis of a therapy with antibiotics and decongestant nasal drops in acute sinusitis. Phytomedicine 3, 1994, 177-181.

⁴Dokumentacja rejestracyjna leku Sinupret extract.

⁵März R.W., Ismail C., Popp M.A.: Action profile and efficacy of a herbal combination preparation for the treatment of sinusitis.Wien Med Wochenschr 1999; 149: 202-208.