R. Singhala, P. Tiwaria, A. Dusejab, R. Ramachandranc, A. Patiald, and S. Attrid, “Quantification of plasma levels of antiviral drug sofosbuvir and its metabolite GS331007 in patients of chronic hepatitis C with chronic kidney disease using UPLC-MS/MS method”, Asian J Pharm Res Dev, vol. 8, no. 1, pp. 59–66, Feb. 2020.