Kreith, Kurt Nonlinear differential equations with monotone solutions. (English) Zbl 0417.34017 Pac. J. Math. 81, 101-111 (1979). MSC: 34A34 34C10 × Cite Format Result Cite Review PDF Full Text: DOI
Elias, Uri Necessary conditions and sufficient conditions for disfocality and disconjugacy of a differential equation. (English) Zbl 0378.34027 Pac. J. Math. 81, 379-397 (1979). MSC: 34C10 × Cite Format Result Cite Review PDF Full Text: DOI