共 45 条
- [3] A CRITERION OF UNCONDITIONAL BASIC PROPERTY OF SYSTEMS OF EIGENFUNCTIONS AND ASSOCIATED FUNCTIONS OF ORDINARY DIFFERENTIAL-OPERATORS DOKLADY AKADEMII NAUK SSSR, 1990, 314 (01): : 25 - 28
- [9] On the nonself-adjoint ordinary differential operators with periodic boundary conditions Israel Journal of Mathematics, 2010, 176 : 195 - 207