共 50 条
- [33] SELF-ADJOINT EXTENSIONS OF CERTAIN SINGULAR PARTIAL DIFFERENTIAL OPERATORS DOKLADY AKADEMII NAUK SSSR, 1967, 176 (06): : 1236 - &
- [36] On H-4-perturbations of self-adjoint operators PARTIAL DIFFERENTIAL EQUATIONS AND SPECTRAL THEORY, 2001, 126 : 179 - 196
- [40] Global solvability on the torus for certain classes of formally self-adjoint operators manuscripta mathematica, 2000, 103 : 9 - 18