Wichai Witthayakiattilerd และ Anusorn Chonweerayoot. (2006) Piecewise continuous almost periodic solutions for nonlinear impulsive differential equations. Chulalongkorn University:ม.ป.ท.Wichai Witthayakiattilerd และ Anusorn Chonweerayoot. 2006. Piecewise continuous almost periodic solutions for nonlinear impulsive differential equations. ม.ป.ท.:Chulalongkorn University;Wichai Witthayakiattilerd และ Anusorn Chonweerayoot. Piecewise continuous almost periodic solutions for nonlinear impulsive differential equations. ม.ป.ท.:Chulalongkorn University, 2006. Print.