Alimzhanova, M., Adilbekov, Y., Nurzhanova, Y., & Batyrbekova, S. (2016). Determination of ethinylestradiol and norgestrel in water using solid-phase microextraction. Chemical Bulletin of Kazakh National University, 83(3-4), 52-62. https://doi.org/https://doi.org/10.15328/cb700