1. Fleming, W. H. (1988). Future Directions in Control Theory - A Mathematical Perspective. Philadelphia: SIAM.
2. Optimal Control Problems in Banach Spaces
3. Optimal problem for retarded semilinear differential equations;Park D. G.;J. Korean Math. Soc,1999
4. Schauder’s fixed-point theorem in nonlinear controllability problems;Klamka J.;Control Cybern. J,2000
5. Klamka, J. (2019). Controllability and Minimum Energy Control, Studies in Systems, Decision and Control, Vol. 162. Cham: Springer.