Publisher
Springer Science and Business Media LLC
Subject
Algebra and Number Theory,Analysis
Reference9 articles.
1. Moretto, S: Sull’esistenza di soluzioni periodiche per l’equazione y ′ = f ( t , y ) $y' =f(t, y)$ . Ann. Univ. Ferrara 8, 61-67 (1958)
2. AIP Conf. Proc.;C Bereanu,2006
3. Mawhin, J: First order ordinary differential equations with several periodic solutions. Z. Angew. Math. Phys. 38, 257-265 (1987)
4. Obersnel, F, Omari, P: Old and new results for first order periodic ODEs without uniqueness: a comprehensive analysis via lower and upper solutions. Adv. Nonlinear Stud. 4, 323-376 (2004)
5. Lakshmikantham, V, Leela, S: Existence and monotone method for periodic solutions of first order differential equations. J. Math. Anal. Appl. 91, 237-243 (1983)