N. T. Le, S. T. Pham, K. D. Dang, T. T. Le, Y. H. Tran, and T. N. Nguyen, “Formulation of Lozenges Containing Menthol and <i>Citrus hystrix</i> DC. Essential Oil for Pharyngitis Support Treatment: http://www.doi.org/10.26538/tjnpr/v7i10.17”, TJNPR, vol. 7, no. 10, pp. 4233–4241, Oct. 2023.