Al-Awadi, S. S., A. A. Ramadhan, F. T. Ibrahim, and A. K. Abbood. “Optical and Structural Properties of Titanium Dioxide Papered by DC Magneto-Sputtering As a NO2 Gas Sensor”. Iraqi Journal of Science, Vol. 61, no. 10, Oct. 2020, pp. 2562-9, doi:10.24996/ijs.2020.61.10.12.