@article{DAN_1983_272_4_a24,
     author = {E. V. Chuprunov and T. N. Tarkhova},
     title = {On the superposition of crystallographic group orbits},
     journal = {Doklady Akademii Nauk},
     pages = {873--876},
     publisher = {mathdoc},
     volume = {272},
     number = {4},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_272_4_a24/}
}