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- [1] EXISTENCE THEOREMS FOR NONLINEAR BOUNDARY-VALUE PROBLEMS CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, 1974, 26 (04): : 884 - 892
- [6] NONLINEAR BOUNDARY-VALUE PROBLEMS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1975, 22 (01): : A137 - A137
- [9] UNIQUENESS THEOREMS FOR SINGULAR BOUNDARY-VALUE PROBLEMS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1976, 23 (01): : A126 - A126