Md Rapi, N. I. ., A. S. . Zulkifli, N. S. M. . Zailani, M. S. . Basir, M. Z. . Mohd Yusoff, and S. Ahmad Kamil. “PH-Engineered Tm³⁺/Yb³⁺ Co-Doped TiO₂: Morphological and Structural Properties Transformation and Photocatalytic Degradation Activity Performance”. Trends in Sciences, vol. 22, no. 9, July 2025, p. 10238, doi:10.48048/tis.2025.10238.