@article{DAN_1976_228_5_a13,
     author = {B. U. Barshchevskii and G. M. Safronov},
     title = {On the regularities of exciton states in $\mathrm{PbHal}_2$ and $\mathrm{TiHal}$},
     journal = {Doklady Akademii Nauk},
     pages = {1065--1068},
     publisher = {mathdoc},
     volume = {228},
     number = {5},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_228_5_a13/}
}