1. Study of water quality of Hudiara drain, India–Pakistan;Afzal;Environmental International,2000
2. Agbu, A.A., 1984. Quality of well water in Samaru, MSc thesis. Ahmadu Bello University, Zaria, Nigeria.
3. Assessment of toxicity level of fluoride in underground waters used for irrigation in Bahrain;Akhter;Environmental Toxicology and Water Quality,1998
4. Alaribe, H.C., 1984. Quality of well water in Old Zaria City, MSc thesis, Ahmadu Bello University, Zaria, Nigeria.
5. Model choice in multicriteria decision aid;Al-Shemmeri;European Journal of Operational Research,1997