00564nam a2200181Ia 4500 515.72 Io64.IS Iohvidov, I. S. and Others Introduction to the spectral theory of operators in spaces with an indefinite metric By I. S. Iohvidov, M. G. Krein and H. Langer Berlin Akademie-Verlag 1982 120p. Bibl. Mathematical research v. 9 Krein, M. G. ; jt. auth. Langer, H. ; jt. auth. 0 0 0 0 ISI ISI 1998-09-21 0 515.72 Io64.IS DP18734 2019-02-14 00:00:00 2019-02-14 BK 12535 12535 12535