1. Berge Berge, C. , C. [1985]: Graphs. Second Edition. Elsevier, Amsterdam 1985
2. Bollobás Bollobás, B. , B. [1998]: Modern Graph Theory. Springer, New York 1998
3. Bondy Bondy, J.A. , J.A. [1995]: Basic graph theory: paths and circuits. In: Handbook of Combinatorics; Vol. 1 (R.L. Graham Graham, R.L. , M. Grötschel Grötschel, M. , L. Lovász Lovász, L. , eds.), Elsevier, Amsterdam 1995
4. Bondy Bondy, J.A. , J.A., and Murty Murty, U.S.R. , U.S.R. [2008]: Graph Theory. Springer, New York 2008
5. Diestel Diestel, R. , R. [2010]: Graph Theory. Fourth Edition. Springer, New York 2010