Thaiprayoon C, Tariboon J, Khumsup P. Periodic Boundary Value Problems for the Second Order Impulsive Differential Equations. Comm. Math. Appl. [Internet]. 2010 Dec. 25 [cited 2024 Apr. 28];1(3):153-64. Available from: http://www.rgnpublications.com/journals/index.php/cma/article/view/123