1. Abdel-Sabour MF (2014) NORM in waste derived From oil and gas production. http://www.researchgate.net/profile/Mamdouh_AbdelSabour/publication/264722815_NORM_in_Waste_Derived_From_Oil_and_Gas_Production.pdf.
2. Leukemia in shoe-workers exposed chronically to benzene;Aksoy;Blood,1974
3. Distribution of scales containing NORM in different oilfields equipment;Al-Masri;Appl. Radiat. Isot.,2005
4. NORM emissions from heavy oil and natural gas fired power plants in Syria;Al-Masri;J. Environ. Radioact.,2012
5. ALNabhani, K., Khan, F., Yang, M., 2015. Technologically enhanced naturally occurring radioactive materials in oil and gas production: a silent killer. Process Safety and Environment Protection, PSEP. http://www.psep.ichemejournals.com/article/S0957-5820(15)00177-9/pdf.