00678nam a2200193Ia 4500082002000000100003100020245013700051260003400188300001600222490003300238500000500271690000600276700002900282700002700311952010200338964001700440921001000457999001700467  a515.72bIo64.IS  aIohvidov, I. S. and Others  aIntroduction to the spectral theory of operators in spaces with an indefinite metricbcBy I. S. Iohvidov, M. G. Krein and H. Langer  aBerlinbAkademie-Verlagc1982  a120p. Bibl.  aMathematical researchv v. 9  a  a   aKrein, M. G. ; jt. auth.  aLanger, H. ; jt. auth.  00104070aISIbISId1998-09-21l0o515.72 Io64.ISpDP18734r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a12535  c12535d12535