1. Boundary value problems for differential equations with deviating arguments;Agarwal;J. Math. Phy. Sci.,1992
2. Introduction to the Theory of Functional Differential Equations;Azbelev,1991
3. Functional boundary value problems and smoothness of solutions;Ehme;Nonlin. Anal.,1996
4. Boundary value problems for differential equations with deviating arguments;Grimm;Aeq. Math.,1970
5. Boundary value problems for retarded functional differential equations;Hetzer;Comment. Math. Univ. Carol.,1975