Öktemer, T., K. İpçi, N. Bayar Muluk, and C. Cingi. “A Pastille Combining Myrrh Tincture, Peppermint Oil and Menthol to Treat the Upper Airway”. ENT Updates, vol. 5, no. 3, Feb. 2015, doi:10.2399/jmu.2015003011.