O. Bordun, B. Bordun, I. Kukharskyy, and I. Medvid, “The Luminescent Centra in thin Films of β–Ga2O3 and (Y0.06Ga0.94)2O3”, Phys. Chem. Sol. State, vol. 17, no. 1, pp. 53–59, Mar. 2016.