1. Izobov, N.A. and Makarov, E.K., On Lyapunov irregular linear systems with a
parameter multiplying the derivative, Differ. Uravn.,
1988, vol. 24, no. 11, pp. 1870–1880.
2. Lyapunov, A.M., Sobr. soch.: v 6-ti t. T. 2 (Collected
Works in 6 Vols. Vol. 2), Moscow–Leningrad: Akad. Nauk SSSR, 1956.
3. Izobov, N.A., Research on the theory of characteristic Lyapunov exponents
and its applications in Belorussia, Differ. Uravn., 1993,
vol. 29, no. 12, pp. 2034–2055.
4. Makarov, E.K., On the measure of the irregularity set of a linear system with
a parameter multiplying the derivative, Dokl. Akad.
Nauk BSSR, 1989, vol. 33, no. 4, pp. 302–305.
5. Lipnitskii, A.V., On the measure of irregularity sets of linear systems,
Differ. Uravn., 1998, vol. 34, no. 12,
pp. 211–215.