PRADEEP KUMAR, et al. “Validation and Stability of RP-HPLC Method for the Determination of Efavirenz As Bulk Drug and in Pharmaceautical Formulations”. International Journal of Pharma and Bio Sciences, vol. 2, no. 4, Dec. 2011, pp. 220-31, https://ijpbs.net/index.php/journal/article/view/1015.