ANTAKLI, SAAD, NAZERA SARKIS, and NAYLA NABO. 2010. “Determination of Fat Soluble Vitamins E, D2, A, K in Syrian Pharmaceutical Preparations by High Performance Liquid Chromatography With UV-DAD Detection”. Asian Journal of Chemistry 22 (6):4939-44. https://asianpubs.org/index.php/ajchem/article/view/16795.