Lusternik, L. A., & Sobolev, V. J. (1985). Elements of functional analysis (23.).
Chicago Edition CitationLusternik, L A., and V J. Sobolev. Elements of Functional Analysis. 23. Hindustan Publishing Corporation, New Delhi, 1985.
MLA Edition CitationLusternik, L A., and V J. Sobolev. Elements of Functional Analysis. 23. 1985.
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