2.Nazir Sabar Hamad Ali al-Mohammadi, climate and electricity consumption in Ramadi city, PhD thesis, unpublished, Faculty of Education, Mustansiriya University, 2003
5. Department of electricity in Erbil, planning department, unpublished records, 2017.
6. Ministry of Planning, Central Bureau of Statistics, Department of Industrial Statistics, results of water and electricity projects statistics, unpublished data, 2017.
7. Interview with engineer Farhad Osman Hassan, director of the operation planning and control department at Erbil electricity, on Sunday, 5/11/2017.
8. Ministry of electricity in the Kurdistan Region, Department of electricity in Erbil, planning department, unpublished records, 2017 .
9. Interview with engineer Farhad Osman Hassan, director of the operation planning and Control Department, on Sunday, at 10 am, 8/11/2017.
10. Interview with engineer Farhad Osman Hassan, director of the operation planning and Control Department, on Monday,at 11 am, 9/11/2017.
13. Interview with Mr. Farhad Osman Hassan, expert and planning manager at Erbil electricity, 12/5/2017.
14. Interview with Mr. Farhad Osman Hassan, planning manager at Erbil electricity,at 9 am, 25/4/2017.
15. Interview with Mr. Farhad Osman Hassan, planning manager at Erbil electricity, expert, 20-4-2017.