1. Analysis of the gamma-emitting impurities In 99mtc and spent 99mo generators;El-Tahawy;Radiat. Phys. Chem.,1994
2. IAEA, 1989. Measurement of Radionuclides in Food and Environment, International Atomic Energy Agency Vienna, Technical Reports Series No. 295.
3. IAEA, 1996. International Basic Saftey Standard for Protection Against Ionizing Radiation and Saftey of Radion Sources Safety Series No. 115.
4. IAEA, 2009. Safety standards for protecting people and the environment. Regulations for the Safe Transport of Radioactive Material Edition, No. TS-R-1 Safety Requirements.
5. Radiation survey of aircraft and heavy machinery scrap;Idriss;Appl. Radiat. Isot.,2012