S. A. Klimin and A. V. Peschanskii, Optical spectroscopy study of KDy(WO₄)₂: Crystal-field levels of Dy³⁺ and the Jahn–Teller transition, Low Temp. Phys. 47, (2021) [Fiz. Nizk. Temp. 47, 1061-1071, (2021)] DOI: https://doi.org/10.1063/10.0006579.