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- [6] MODEL ELEMENTS OF NON-SELFADJOINT OPERATORS DOKLADY AKADEMII NAUK SSSR, 1962, 142 (05): : 1043 - &
- [7] SPECTRUM OF NON-SELFADJOINT DIFFERENTIAL OPERATORS DOKLADY AKADEMII NAUK SSSR, 1968, 183 (04): : 791 - &
- [9] Non-selfadjoint perturbations of selfadjoint operators in 2 dimensions I ANNALES HENRI POINCARE, 2004, 5 (01): : 1 - 73
- [10] On Borg’s method for non-selfadjoint Sturm–Liouville operators Analysis and Mathematical Physics, 2019, 9 : 2133 - 2150