Shlini, Dandem, Chaitanya M, and Shalini S. “Method Development and Validation of Levonorgesterel and Ethinyl Estradiol in Bulk and Its Pharmaceuticals Dosage Forms”. Frontier Journal of Pharmaceutical Sciences and Research 8, no. 3 (November 2, 2025): 5–10. Accessed December 6, 2025. https://frontierjournals.org/index.php/fjpsr/article/view/35.