Green's functions for reducible functional differential equations
  In this work we study differential problems in which the reflection operator and the Hilbert transform are involved. We reduce these problems to ODEs in order to solve them. Also, we describe a general method for obtaining the Green's function of reducible functional differential equations and illustrate it with the case of homogeneous boundary value problems with reflection and several specific examples. 
Alberto Cabada and F. Adri\'an F. Tojo
math.CA