A. Sharma, “Nano-structured phases of gallium oxide (GaOOH, α-Ga2O3, β-Ga2O3, γ-Ga2O3, δ-Ga2O3, and ε-Ga2O3): fabrication, structural, and electronic structure investigations”, Int. Nano Lett., vol. 10, no. 1 (March 2020), Feb. 2020, doi: 10.1007/s40089-020-00295-w.