@article{MMO_1957_6_a11,
     author = {I. S. Iokhvidov and M. G. Krein},
     title = {Remark to the article {``Spectral} theory of operators in space with indefinite {metric.~I''} {(Trudy} {Mosk.} {Mat.} {O-va} 5 (1956))},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {486},
     publisher = {mathdoc},
     volume = {6},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1957_6_a11/}
}