@article{SM_1971_13_4_a4,
     author = {A. I. Loginov},
     title = {Complete commutative symmetric operator algebras in the {Pontryagin} space~$\Pi_1$},
     journal = {Sbornik. Mathematics},
     pages = {569--576},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_13_4_a4/}
}