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- [1] SOME LOCAL GLOBAL PRINCIPLES FOR FORMALLY REAL FIELDS CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, 1977, 29 (03): : 606 - 614
- [5] APPROXIMATION PROPERTIES FOR FORMALLY REAL FIELDS - PRELIMINARY REPORT NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1975, 22 (06): : A618 - A618