Hou, D., Khureldavaa, O., Zhang, F., He, J. and Amarsanaa, B. (2019) “Determination of OCPs and PCBs in environmental water samples by GC-DLLME optimized by Response Surface Methodology”, Mongolian Journal of Chemistry, 20(46), pp. 13–23. doi: 10.5564/mjc.v20i46.1237.