1. Bellman, R.,Introduction to Matrix Analysis, McGraw-Hill, New York, New York, 1960.
2. Hahn, V.,Theory and Application of Lyapunov's Direct Method, Prentice-Hall, Englewood Cliffs, New Jersey, 1963.
3. Moore, R. E.,Interval Analysis, Prentice-Hall, Englewood Cliffs, New Jersey, 1966.
4. Argoun, M. B.,On Sufficient Conditions for the Stability of Interval Matrices, International Journal of Control, Vol. 44, pp. 1245?1250, 1986.
5. Argoun, M. B.,Allowable Coefficient Perturbations with Preserved Stability of a Hurwitz Polynomial, International Journal of Control, Vol. 44, p. 927, 1986.