Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1980_250_2_a23, author = {V. A. Koptsik}, title = {Symmetry of real crystals}, journal = {Doklady Akademii Nauk}, pages = {353--357}, publisher = {mathdoc}, volume = {250}, number = {2}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1980_250_2_a23/} }
V. A. Koptsik. Symmetry of real crystals. Doklady Akademii Nauk, Tome 250 (1980) no. 2, pp. 353-357. http://geodesic.mathdoc.fr/item/DAN_1980_250_2_a23/