弱*拓扑下Banach空间中二阶Volterra型积分-微分方程的周期边值问题解的存在性
약*탁복하Banach공간중이계Volterra형적분-미분방정적주기변치문제해적존재성
The Existence of Solutions for Second Order Volterra Integro-differential Equations in Banach Space Under the Weak* Topology