Temperature and impurity concentration effects on upconversion luminescence in LaInO3 doped with Er3+ - A. Sarakovskis; J. Grube; K. Strals; G. Krieke; M. Springis; N. Mironova-Ulmane; V. Skvortsova; E. K. Yukhno; L. A. Bashkirov (Low Temperature Physics, 2016)