EPR, optical and thermometric studies of Cr3+ ions in the α-Al2O3 synthetic single crystal. - Mironova – Ulmane, N.; Brik, M.G.; Grube, J.; Krieke, G.; M.Kemere; Antuzevics, A.; Gabrusenoks, E.; Skvortsova, V.; Elsts, E.; Sarakovskis, A.; Piasecki, M.; Popov, A.I. (Optical Materials, 2022)