Somekawa, S., Y. Kusumoto, H. Yang, M. Abdulla-Al-Mamun, and B. Ahmmad. “Fabrication, N-Doping Mechanism and Evaluation of N-Doped TiO<sub>2</Sub> Thin Films Based on Laser Ablation Method”. Journal of Scientific Research, vol. 2, no. 1, Dec. 2009, pp. 17-23, doi:10.3329/jsr.v2i1.2992.