“Characterization of Nanocrystalline Nickel Doped Titanium -Dioxide, Synthesized by Co Precipitation Method”., Int. J. Emerg. Trends Sci. Technol., vol. 4, no. 09, pp. 6103–6109, Sep. 2017, Accessed: Sep. 28, 2026. [Online]. Available: http://igmpublication.com/ijetst.in/index.php/ijetst/article/view/1424