1-4 of 4 Books

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

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

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

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