By Faà di Bruno’s formula, using the fixed-point theorems of Schauder and Banach, we study the existence and uniqueness of smooth solutions of an iterative functional differential equation .
"Smooth Solutions of a Class of Iterative Functional Differential Equations." Abstr. Appl. Anal. 2012 (SI09) 1 - 13, 2012. https://doi.org/10.1155/2012/954352