@article{AA_2007_19_4_a1,
     author = {N. A. Vavilov},
     title = {Can one see the signs of structure constants?},
     journal = {Algebra i analiz},
     pages = {34--68},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2007_19_4_a1/}
}