Biggs, N. (1993). Algebraic graph theory (2nd ed.). Cambridge Univ. Pr.
Cita Chicago (17th ed.)Biggs, Norman. Algebraic Graph Theory. 2nd ed. London: Cambridge Univ. Pr, 1993.
Cita MLA (9th ed.)Biggs, Norman. Algebraic Graph Theory. 2nd ed. Cambridge Univ. Pr, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.