Kadim Ayal, Asmaa, et al. “Effect of Deposition Time of Mn on Photoelectrochemical Properties of Mn TiO2 Nanotubes”. International Journal of Engineering & Technology, vol. 7, no. 4.14, Dec. 2019, pp. 454-7, https://doi.org/10.14419/ijet.v7i4.14.27716.