E. Budi Nursanto, R. M. R. Sinaga, D. Floresyona, R. M. Rachman, and A. Nugroho, “One Step Hydrothermal Synthesis of Nickel Doped TiO2 Nanotube”, J. Emerg. Sup. Chain Clean En. and Proc. Eng. , vol. 2, no. 1, pp. 65–73, Apr. 2023.