1. Kirillova, F.M. and Strel’tsov, S.V., Necessary Optimality Conditions for Controls in Hybrid Systems, in Upravlyaemye sistemy (Control Systems), Novosibirsk: Inst. Mat., 1975, no. 14, pp. 24–33.
2. Akhundov, A.A., Controllability of Linear Hybrid Systems, in Upravlyaemye sistemy (Control Systems), Novosibirsk: Inst. Mat., 1975, no. 14, pp. 4–10.
3. De la Sen, M., The Reachability and Observability of Hybrid Mulitrate Sampling Linear Systems, Comput. Math. Appl., 1996, vol. 3, no. 1, pp. 109–122.
4. Van der Schaft, A. and Shumacher, H., An Introduction to Hybrid Dynamical Systems, Berlin, 2000.
5. De la Sen, M. and Luo, N.S., Design of Linear Observers for a Class of Linear Hybrid Systems, Internat. J. Systems Sci., 2000, vol. 31, no. 9, pp. 1077–1090.