El-Khayat, H. , Abdel-Hamid, H. , Mahmoud, K. , Gaber, H. , Hoda, H. , Taleb, M. , Flefel, H.. "Snails and Fish as Pollution Biomarkers in Lake Manzala and Laboratory C: Laboratory Exposed Snails to Chemical Mixtures ". World Academy of Science, Engineering and Technology, Open Science Index 119, International Journal of Agricultural and Biosystems Engineering (2016), 10(11), 741 - 752.