Guirguis, L. A., Mahmoud, A. H., Zahran, M. A., & Sharaf, M. M. (2014). Oxidative Leaching Kinetics of Vanadium from Egyptian Boiler Ash under Acidic Oxidizing Conditions. International Journal of Sciences: Basic and Applied Research (IJSBAR), 14(1), 495-505. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/1923