1-4 of 4 Books

Introduction to the theory and applications of functional differential equations
By Vladimir Borisovich Kolmanovskiĭ,V. Kolmanovskii,A. Myshkis

Applied theory of functional differential equations
By Vladimir Borisovich Kolmanovskiĭ,V. Kolmanovskii,A. Myshkis

Stability of differential equations with aftereffect
By N. V. Azbelev,N.V. Azbelev,P.M. Simonov

Oscillation theory for difference and functional differential equations
By Ravi P. Agarwal,R.P. Agarwal,Said R. Grace,D. O'Regan