1. R. A. Johnson, K. J. Palmer and G. R. Sell, Ergodic properties of linear dynamical systems.SIAM. J. Math. Anal.,18 (1987), 1–33.
2. S. T. Liao, On characteristic exponents construction of a new Borel set for the multiplicative ergodic theorem for vector fields,Acta Scientiarum Naturalium Universitatis Pekinensis,29 (1993), 277–302.
3. V. V. Niemytski and V. V. Stepanov,Qualitative Theory of Differential Equations, Princeton, 1960.
4. N. E. Steenrod,The Topology of Fibre Bundles, Princeton, 1951.
5. S. T. Liao, An extended C1 closing lemma,Acta Scientiarum Naturalium Universitatis Pekinensis, 3 (1979), 1–41. (in Chinese)