Dash, Abhiram, Neelu Jain, and Harish Pandey. “Cost Effective, Efficient and Stability Indicating Method Development & Validation for Determination of Related Substances for Levonorgestrel & Ethinyl Estradiol Tablets”. Journal of Drug Delivery and Therapeutics 11, no. 2 (March 15, 2021): 153–163. Accessed July 11, 2026. https://www.jddtonline.info/index.php/jddt/article/view/4581.