Drasovean, Romana, and Simona Condurache-Bota. 2016. “Correlation Studies Between Sol Aging Time and Substrate Dipping Time Parameter and Optical Properties of Cobalt Oxide Layers”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 25 (1): 17-25. https://gssrr.org/JournalOfBasicAndApplied/article/view/5051.