@article{Shcherbakov:1985,author = {I. A. Shcherbakov},title = {Energy transfer in solids, new active media for solid-state lasers},publisher = {Physics-Uspekhi},year = {1985},journal = {Phys. Usp.},volume = {28},number = {6},pages = {530-531},url = {https://ufn.ru/en/articles/1985/6/l/},doi = {10.1070/PU1985v028n06ABEH005226}}