Irzooqi, W. S. (2026). A STUDY OF THE OPTICAL PROPERTIES AND ENERGY GAP TUNING THROUGH NICKEL DOPING IN Z-SCAN AND DIFFUSE REFLECTION TECHNIQUES FOR LA₀.₅SR₁.₅CO₂₋ₓNIₓO₂ COMPOSITE PARTICLES. International Journal Multidisciplinary (IJMI), 3(4), 22–32. https://doi.org/10.61796/ijmi.v3i4.617