@article{SM_1968_6_1_a2,
     author = {V. D. Belousov},
     title = {Systems of orthogonal operations},
     journal = {Sbornik. Mathematics},
     pages = {33--52},
     year = {1968},
     volume = {6},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_6_1_a2/}
}