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- [1] ON THE ABSENCE OF POSITIVE EIGENVALUES FOR ONE-BODY SCHRODINGER-OPERATORS JOURNAL D ANALYSE MATHEMATIQUE, 1982, 41 : 272 - 284
- [9] NONEXISTENCE OF POSITIVE EIGENVALUES OF SCHRODINGER OPERATORS IN INFINITE DOMAINS JOURNAL OF THE FACULTY OF SCIENCE UNIVERSITY OF TOKYO SECTION 1-MATHEMATICS ASTRONOMY PHYSICS CHEMISTRY, 1972, 19 (03): : 393 - 402