Influence of Co-doping on the thermal, structural, and optical properties of sol–gel derived ZnO nanoparticles
Materials Chemistry and Physics (2010) - Comment
doi: 10.1016/j.matchemphys.2009.11.024  issn: 0254-0584 

Richa Bhargava, Prashant K. Sharma, Ranu K. Dutta, Sanjeev Kumar, Avinash C. Pandey, Naresh Kumar