Harshalatha P, Kothapalli Bannoth Chandrasekhar, and Chandrasekhar MV. “Stability Indicating RP-HPLC Method for Simultaneous Determination of Grazoprevir and Elbasvir in Bulk and Tablet Dosage Form”. International Journal of Research in Pharmaceutical Sciences, vol. 9, no. 4, Sept. 2018, pp. 947-55, https://ijrps.com/home/article/view/4390.