Buda, S. . “Phase Transformation and Band Gap Narrowing in Mechanochemically Synthesized Nitrogen-Doped TiO₂ for Use in Dye Sensitized Solar Cell”. International Journal of Science for Global Sustainability, vol. 11, no. 3, Oct. 2025, pp. 313-6, doi:10.57233/ijsgs.v11i3.951.