Arun Kumar V, Vijey Aanandhi M, Gandhimathi R, and Sumithra M. “A Review on Bioanalytical Method Development and Pre-Method Validation Concepts Using SPE and LLE Process by LC-MS/MS Method”. International Journal of Research in Pharmaceutical Sciences 12, no. 2 (May 3, 2021): 1353-1359. Accessed December 2, 2021. https://pharmascope.org/index.php/ijrps/article/view/4689.