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- [25] MINIMUM NUMBER OF CRITICAL-POINTS ON 2-MANIFOLDS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1974, 21 (01): : A230 - A230
- [28] EXTENSIONS OF REAL VALUED FUNCTIONS WITHOUT CRITICAL-POINTS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1973, 20 (03): : A400 - A400
- [30] METASTABILITY AND CRITICAL-POINTS JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1983, 16 (32): : 1145 - 1149