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- [5] SPARABILITY OF SPECTRAL SUBSPACES OF NOT SELF-ADJOINT OPERATOR DOKLADY AKADEMII NAUK SSSR, 1978, 239 (05): : 1052 - 1055
- [7] EQUICONVERGENCE OF EXPANSIONS IN FOURIER TRIGONOMETRIC SERIES AND IN EIGENFUNCTION OF KELDYSH,MV BUNDLE OF ORDINARY, NOT SELF-ADJOINT DIFFERENTIAL OPERATORS DOKLADY AKADEMII NAUK SSSR, 1975, 225 (03): : 497 - 499