R. Kumar, H. D. Singh, H. Singh, R. Dev, and A. Tyagi, “Method Development and Validation for Quantification of Residual Solvents in Atorvastatin Calcium Drug Substance by GC-HS Using Fid Detector”, J. Res. Appl. Sci. Biotechnol., vol. 1, no. 3, pp. 186–194, Aug. 2022.