The existence and stability of periodic solutions of systems with lag which are close to a Ljapunov system
A. F. Kleimenov

This publication is cited in the following articles:

1. Yu. F. Dolgii, “Application of self-adjoint boundary value problems to investigation of stability of periodic delay systems”, Proc. Steklov Inst. Math. (Suppl.), 255, suppl. 2 (2006), S16–S25