@article{SM_1998_189_12_a5,
     author = {D. N. Ivanov},
     title = {Orthogonal decompositions of associative algebras, and balanced systems of idempotents},
     journal = {Sbornik. Mathematics},
     pages = {1819--1838},
     publisher = {mathdoc},
     volume = {189},
     number = {12},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1998_189_12_a5/}
}