Tyagi, Shaily, Ruchi Tyagi, Rajavelly Prem, Ajeet Agrawal, M Agarwal, and K Chacko. “Development and Optimization of Assay Method of Filgrastim Injection by Reverse Phase- High Performance Liquid Chromatography”. The Pharma Research 19, no. 02 (October 2, 2018): 1-7. Accessed December 13, 2018. http://www.s-epub.in/ejournal/index.php/tphres/article/view/31.