For citations:
Lashkovskaya E.I., Hoha A.V., Pligovka A.N., Chubenko E.B., Zhivulko V.D., Monaico E.V., Gaponenko N.V. Upconversion Luminescence in Barium Titanate Xerogel Doped with Erbium and Ytterbium in Porous Anodic Aluminum Oxide. Doklady BGUIR. 2022;20(7):28-35. (In Russ.) https://doi.org/10.35596/1729-7648-2022-20-7-28-35