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- [5] Descending order condition of two forms of third-order linear differential equations Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing, 19 (05): : 520 - 524
- [8] STRUCTURE OF OSCILLATORY SOLUTIONS OF THIRD-ORDER LINEAR-DIFFERENTIAL EQUATIONS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1975, 22 (01): : A142 - A142