GhaffariTooran, S. , Abolghasemi, H. , Bahmanyar, H. , Esmaeili, M. , Safari, A.. "A New Correlation for Overall Sherwood Number in Packed Liquid-Liquid Extraction Column". World Academy of Science, Engineering and Technology, Open Science Index 31, International Journal of Chemical and Molecular Engineering (2009), 3(7), 344 - 346.