@article{RM_1989_44_2_a7,
     author = {D. N. Ivanov},
     title = {A theorem on the~subalgebras forming an~orthogonal 
},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {283--284},
     publisher = {mathdoc},
     volume = {44},
     number = {2},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1989_44_2_a7/}
}