1. Al-Ghafri A (2002) Traditional Water Distribution in Aflaj Irrigation Systems of Oman. Final Report. The United Nations University, Tokyo
2. Al-Ghafri A (2018) Overview about the Aflaj of Oman. Proceedings of the International Symposium of Khattaras and Aflaj, Erachidiya, pp 1–22
3. Al-Ghafri A et al (2003) Daudi Aflaj: the Qanats of Oman. The proceedings of the Third Symposium on Xinjang Uyghur. Chiba University, Chiba, pp 29–36
4. Al-Ghafri A (2004) Study on water distribution management of aflaj irrigation systems of Oman. DAg diss. Hokkaido University
5. Al-Ghafri A et al (2004) Irrigation Scheduling of Aflaj of Oman: Methods and Modernization, Hokkaïdo University, https://www.inweh.unu.edu/drylands/docs/Publications/AlGhafri.pdf