@article{DAN_1965_160_6_a8,
     author = {M. A. Naimark},
     title = {Conditions for unitary equivalence of commutative symmetric algebras in the space $\Pi_k$},
     journal = {Doklady Akademii Nauk},
     pages = {1257--1260},
     publisher = {mathdoc},
     volume = {160},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_160_6_a8/}
}