edited by I. Gohberg

Birkhäuser Verlag 1988 Operator theory : advances and applications v. 32

: Boston , : Basel

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volume editors, C. Apostol ... [et al.] ; managing editor, Gr. Arsene

Birkhäuser-Verlag 1982 Operator theory : advances and applications v. 6

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5th International Conference on Operator Theory, Timisoara and Herculane (Romania), June 2-12, 1980 ; ed., C. Apostol ... [et al.]

Birkhäuser 1981 Operator theory : advances and applications v. 2

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