RIZK, Mohammed Salem; SULTAN, Maha; MOHAMED, Dalia; TONY, Rehab Moussa. Simultaneous determination of levonorgestrel and ethinyl estradiol in combined dosage form utilizing spectrophotometric methods and high performance thin layer chromatographic method on nanosilica gel plates. European Journal of Chemistry, [S. l.], v. 8, n. 1, p. 52–59, 2017. DOI: 10.5155/eurjchem.8.1.52-59.1523. Disponível em: https://eurjchem.com/index.php/eurjchem/article/view/1523. Acesso em: 28 apr. 2024.