PERIODIC SOLUTIONS OF A SECOND-ORDER NONLINEAR VOLTERRA INTEGRO-DIFFERENTIAL EQUATION. Advances in Differential Equations and Control Processes, [S. l.], v. 31, n. 2, p. 285–297, 2024. DOI: 10.17654/0974324324015. Disponível em: https://pphmjopenaccess.com/adecp/article/view/1744. Acesso em: 5 jan. 2026.