k, SWAPNA, et al. “FORMULATION AND EVALUATION OF MONTELUKAST SODIUM AND LEVOCETIRIZINE DIHYDROCHLORIDE SUBLINGUAL TABLETS”. Asian Journal of Pharmaceutical and Clinical Research, vol. 8, no. 1, Jan. 2015, pp. 171-5, https://www.journals.innovareacademics.in/index.php/ajpcr/article/view/3250.