Maryam, B. , , Khodadadi, B. , , Mollatayefe, N. , and Yeganeh- Faal, A. . "Influence of metal (Ag, Cd, Cu)-doping on the optical properties of ZnO nanopowder: Variation of band gap", Applied Chemistry Today, 8, 27, 2013, 43-48. doi: 10.22075/chem.2017.642