@article{DAN_1981_257_1_a18,
     author = {A. A. Kaminskii and A. G. Petrosyan and V. A. Fedorov},
     title = {Cross-cascade, stimulated radiation of $\mathrm{Er}^{3+}$, $\mathrm{Ho}^{3+}$ 
},
     journal = {Doklady Akademii Nauk},
     pages = {79--82},
     publisher = {mathdoc},
     volume = {257},
     number = {1},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_257_1_a18/}
}