1. Alefeld, G.: On the convergence of some interval-arithmetic modifications of Newton's method. SIAM J. Numer. Anal.21, 363?372 (1984)
2. Alefeld, G., Herzberger, J.: Introduction to interval computations. New York: Academic Press 1983
3. Barth, W., Nuding, E.: Optimale Lösung von Intervallgleichungssystemen. Computing12, 117?125 (1974)
4. Berman, A., Plemmons, R.J.: Nonnegative matrices in the mathematical sciences. New York: Academic Press 1979
5. Kulisch, U., Miranker, W.: A new approach to scientific computation. New York: Academic Press 1983