@article{SM_2004_195_11_a1,
     author = {D. N. Ivanov},
     title = {An analogue of {Wagner's} theorem for decompositions of matrix algebras},
     journal = {Sbornik. Mathematics},
     pages = {1557--1574},
     publisher = {mathdoc},
     volume = {195},
     number = {11},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2004_195_11_a1/}
}