1. Lyapunov A. M.,Problème Général de la Mouvement (transl. from Russian), Ann. Fac. Sci. Univ. Touluse9, p. 203–475, 1907. Reproduced in Ann. Math. Study, vol. 17, Princeton 1947.
2. Demidovich B. P.,Lectures on Mathematical Theory of Stability (in Russian), ed. Nauka Moscow, 1967.
3. Bylov B. F., Vinograd R. E., Grobman D. M. andNemyckij V. V.,The Theory of Lyapunov Characteristic Numbers and their Application to the Theory of Stability (in Russian), ed. Nauka Moscow, 1966.
4. Cesari L.,Asymptotic Behaviour and Stability Problems in Ordinary Differential Equations, Springer-Verlag, Berlin, 1959.
5. Oseldec V. I.,The Multiplicative Ergodic Theorem. The Lyapunov Characteristic Numbers of Dynamical Systems, (in Russian). Trudy Mosk. Mat. Obsch.19, p. 179–210, 1968. English traslation in Trans. Mosc. Math. Soc.19, p. 197, 1968.