@article{UZERU_1989_1_a12,
     author = {Yu. V. Karakashian},
     title = {Excitons in semiconductors with narrow forbidden zone},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {144--147},
     publisher = {mathdoc},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_1989_1_a12/}
}