V, S.; Sireesha, R. .; Sivagami, B. . .; Kumar, V. P. .; Chandrasekar, R. .; Babu, M. N. . Simultaneous Estimation of Sofosbuvir and Velpatasvir Tablets by RP- HPLC Method. IJRDPL 2018, 7, 3092 - 3099.