1. Zubov V.I. Lectsii po teorii upravleniya (Lectures on control Theory), Moscow, 1975. pp. 1–494. (In Russ.)
2. Petrov N.N. A solution of a certain problem in control theory.(Russian)// Differencialnye uravnenija №5.1969.pp.962–963
3. Petrov N.N. Local controllability of autonomous systems.(Russian).//Differencialnye uravnenija №4.1968.pp.1218–1232.
4. Vereshchagin I.F. Method for investigating flight regimes of changing mass apparatus. (Russian) Perm.1972
5. Linear controllability by piecewise constant controls with assigned switching times