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- [1] COMPARISON THEOREMS FOR ORDINARY DIFFERENTIAL EQUATIONS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1975, 22 (03): : A407 - A407
- [4] UNIQUENESS THEOREMS FOR ORDINARY DIFFERENTIAL EQUATIONS AMERICAN MATHEMATICAL MONTHLY, 1962, 69 (05): : 421 - &
- [6] UNIQUENESS THEOREMS FOR ORDINARY DIFFERENTIAL EQUATIONS DOKLADY AKADEMII NAUK SSSR, 1958, 120 (04): : 704 - 707
- [10] ADDITION THEOREMS IN ORDINARY DIFFERENTIAL-EQUATIONS AMERICAN MATHEMATICAL MONTHLY, 1987, 94 (09): : 872 - 875