1. Alefeld, G. : On the Convergence of Some Interval-Arithmetic Modifications of Newton's Method, SIAM J. Numer. Anal. 21 (1984), pp. 363–372.
2. Alefeld, G.: Über die Durchführbarkeit des Gaußschen Algorithmus bei Gleichungen mil Intervallen als Koeffizienten, Computing Suppl. 1 (1977), pp. 15–19.
3. Alefeld, G. and Herzberger, J.: Einführung in die Intervallrechnung, Reihe Informatik 12, Bibliographisches Institut, Mannheim, 1974.
4. Alefeld, G. and Herzberger, J.: Introduction to Interval Computations, Academic Press, New York, 1983.
5. Alefeld, G. and Mayer, G.: The Gaussian Algorithm for Linear Systems with Interval Data, in: Carlson, D., Johnson, C. R., Lay, D. C., and Porter, A. D. (eds), Linear Algebra Gems: Assets for the Undergraduate Mathematics, The Mathematical Association of America, MAA Notes 59.