Murray, M C A study to investigate the effect of a propolis-containing mouthrinse on the inhibition of de novo plaque formation. [electronic resource] - Journal of clinical periodontology Nov 1997 - 796-8 p. digital Publication Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial ISSN: 0303-6979 Standard No.: 10.1111/j.1600-051x.1997.tb01191.x doi Subjects--Topical Terms: Anti-Infective Agents, Local--administration & dosageChlorhexidine--administration & dosageDental Plaque--prevention & controlDental Plaque IndexDouble-Blind MethodHumansMouthwashes--therapeutic usePlacebosPropolis--administration & dosage