Karima Benyahia et al. 2021. Ab-initio Calculations of Structure and Electronic Properties of the Ternary Halide perovskite CsSnBr3 in Its Three Phases: Comparative Study. New Ideas Concerning Science and Technology Vol. 10. (Mar. 2021), 128–134. DOI:https://doi.org/10.9734/bpi/nicst/v10/2189E.