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- [9] LOWER BOUNDS FOR THE SPECTRUM OF 2ND-ORDER OPERATORS AND SYSTEMS OF OPERATORS MAXIMUM PRINCIPLES AND EIGENVALUE PROBLEMS IN PARTIAL DIFFERENTIAL EQUATIONS, 1988, 175 : 82 - 93
- [10] Spectrum of some weighted composition operators PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-MATHEMATICAL SCIENCES, 2019, 129 (04):