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- [3] COMPLETENESS OF EIGENFUNCTIONS OF QUADRATIC BEAMS OF ORDINARY DIFFERENTIAL-OPERATORS IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII MATEMATIKA, 1992, (03): : 35 - 44
- [6] SOME PROPERTIES OF EIGENFUNCTIONS AND ADJOINT FUNCTIONS OF ORDINARY DIFFERENTIAL-OPERATORS DOKLADY AKADEMII NAUK SSSR, 1986, 291 (05): : 1054 - 1056
- [9] NECESSARY CONDITION OF THE RIESS BASIC PROPERTY OF THE SYSTEMS OF EIGENFUNCTIONS OF ORDINARY DIFFERENTIAL-OPERATORS DOKLADY AKADEMII NAUK SSSR, 1991, 321 (05): : 873 - 875
- [10] BASES FORMED BY EIGENFUNCTIONS OF ORDINARY DIFFERENTIAL-OPERATORS WITH INTEGRAL BOUNDARY-CONDITIONS VESTNIK MOSKOVSKOGO UNIVERSITETA SERIYA 1 MATEMATIKA MEKHANIKA, 1982, (06): : 12 - 21