References

ON THE FUNDAMENTAL MATRIX OF LINEAR SYSTEMS WITH VARIABLE COEFFICIENTS


[1] R. Bellman, Stability Theory of Differential Equations, Dover Publications, 2008.

[2] J. Cronin, Differential Equations: Introduction and Qualitative Theory, Second ed., Marcel Dekker, 1994.

[3] Y. Okuno and M. Yamamoto, On the relations between the stability of linear systems and the characteristic roots of the coefficient matrix, Proc. Japan Acad. Ser. A 53(1) (1977), 21-24.

[4] M. Yamamoto, On the homogeneous linear systems of differential equations with variable coefficients, Proc. Japan Acad. Ser. A 53(1) (1977), 17-20.

[5] V. I. Zubov, Mathematical Methods for the Study of Automatic Control Systems, Pergamon Press, 1962.