Sengupta, Pinaki, et al. “Stability-Indicating RP-HPLC Method for Simultaneous Determination of Olmesartan Medoxamil and Pioglitazone in Fixed Dose Combination Tablet Dosage Form”. Asian Journal of Chemistry, vol. 22, no. 8, June 2010, pp. 6471-9, https://asianpubs.org/index.php/ajchem/article/view/11817.