1. Biggs NL, Lloyd KE, Wilson RJ. Graph Theory 1736–1936. Clarendon: Oxford University Press, 1976.
2. Diestel R. Graph theory. Heidelberg New York: Springer, 2000.
3. Gibbons A. Algorithmic Graph Theory. Cambrifge: Cambridge University Press, 1985.
4. Godsil CD, Royle G. Algebraic Graph Theory. New York: Springer-Verlag, 2001.
5. Boffey TB. Graph Theory in Operational Research. London: MacMillan, 1982.