S. Saeed-Ul-Hassan, A.-U.-H. Ather, M. Tayyab Ansari, I. Tariq, and S. Karim, “Determination of Montelukast Sodium in Raw Material and Solid Dosage Form Using Reverse Phase HPLC”, ajc, vol. 25, no. 13, pp. 7481–7484, Jul. 2013.