1.    Mohamed MAA, Terao H, Suzuki R, Babiker IS, Ohta K, Kaori K, Kato K. Natural denitrification in the Kakamigahara groundwater basin, Gifu prefecture, central Japan. Science of the Total Environment, 2002, 307(1-3): 191-201.  

2.    Babiker IS., Mohamed MAA., Terao H., Kato K., Ohta, K. Assessment of  groundwater contamination by nitrate leaching from intensive vegetable cultivation using geographical information system. Environment International, 2003, 19/8: 1007 – 1017.

3.    Babiker IS., Mohamed MAA., Komaki K., Ohta K., Kato K. Temporal variations  in the dissolved nutrient stocks in the surface water of the Western North Atlantic Ocean. Journal of Oceanography, 2004, 60:553 – 562.

4.     Chen ZM., Babiker IS., Chen ZX., Komaki K., Mohamed MAA., Kato K. Estimation of interannual variation in productivity of global vegetation using NDVI data. International Journal of Remote Sensing 2004, 25(16): 3139-3159.          

5.   Babiker IS.,  Mohamed MAA., Kato K., Hiyama T. A GIS-based DRASTIC model for assessing aquifer vulnerability in Kakamigahara Heights, Gifu Prefecture, central Japan. The Science of the Total Environment 2005, 345: 127 – 140.

6- Babiker, I.S., M.A.A. Mohamed and T. Hiyama, Assessment of groundwater quality using GIS: the case of Nasuno basin, Tochigi, Japan. Water Resources Management, 2007, 21: 699-715.