L. Moulaoui, A. Najim, A. Laassouli, O. Bajjou, K. Rahmani, and B. M. Bouzid Manaut, “First-Principles Study of Ge-Doped CH₃NH₃PbI₃ Perovskite: : Optical and Electronic Properties”, jsesd, vol. 14, no. STR2E, pp. 67–78, Sep. 2025.