Adeyanju A. On uniform-ultimate boundedness and periodicity results of solutions to certain second order non-linear vector differential equations. Proyecciones (Antofagasta, On line) [Internet]. 2023May16 [cited 2024Apr.25];42(3):757-73. Available from: https://www.revistaproyecciones.cl/index.php/proyecciones/article/view/5421