Sánchez L. A Note on Nontrivial Peniodic Solutions of Dynamical Systems with Subquadratic Potential. Rev. mat. complut. [Internet]. 1 janv. 1994 [cité 30 juill. 2026];7(1):179. Disponible à: https://revistas.ucm.es/index.php/REMA/article/view/REMA9494120179A