@article{RM_1969_24_1_a1,
     author = {S. V. Polin},
     title = {Subalgebras of free algebras of some varieties of multioperator algebras},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {15--24},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {1969},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1969_24_1_a1/}
}