@article{DAN_1987_293_1_a20,
     author = {R. V. Galiulin and S. E. Sigarev},
     title = {On the stability of minerals with holohedral {Fedorov} groups},
     journal = {Doklady Akademii Nauk},
     pages = {99--100},
     publisher = {mathdoc},
     volume = {293},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_293_1_a20/}
}