1. J.-P. Aubin and I. Ekeland, Applied Nonlinear Analysis. New York: John Wiley, 1984. Reprinted by Dover Publications, Mineola NY, 2006.
2. G. A. Jones and J. M. Jones, Elementary Number Theory. New York: Springer Verlag, 1998.
3. A. J. Laub, Matrix Analysis for Scientists & Engineers. Philadelphia, PA: Soc. Industrial and Applied Math., 2005.
4. L. Lovász, “Random walks on graphs: a survey,” in Combinatorics, Paul Erdös is Eighty (D. Miklós, V. T. Sós, and T. Szönyi, eds.), vol. 2, pp. 1–46, Budapest, Hungary: Janos Bolyai Mathematical Society, 1993.
5. J. W. M. Bergmans, Digital Baseband Transmission and Recording. Dordrecht, The Netherlands: Kluwer Acad. Publishers, 1996.