@article{DAN_1963_151_3_a5,
     author = {K. S. Sibirskii},
     title = {Invariants of linear representations of the rotation group of the plane and the problem of the center},
     journal = {Doklady Akademii Nauk},
     pages = {497--500},
     publisher = {mathdoc},
     volume = {151},
     number = {3},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_151_3_a5/}
}