Chihara, T. S. (2011) An Introduction to Orthogonal Polynomials, Courier Corporation.
 Chudnovsky, M. and Seymour, P. (2007) The roots of the independence polynomial of a clawfree graph. J. Combin. Theory Ser. B 97 350–357.
 Godsil, C. D. (1993) Algebraic Combinatorics, Vol. 6, CRC Press.
 Gutman, I. (1990) Graph propagators. In Graph Theory Notes of New York, Vol. XIX, The New York Academy of Sciences, pp. 26–30.
 Heilmann, O. J. and Lieb, E. H. (1972) Theory of monomer–dimer systems. Comm. Math. Phys. 25 190–232.
 Lass, B. (2012) Mehler formulae for matching polynomials of graphs and independence polynomials of clawfree graphs. J. Combin. Theory Ser. B 102 411–423.
 Levit, V. E. and Mandrescu, E. (2005) The independence polynomial of a graph: A survey. In 1st International Conference on Algebraic Informatics (Bozapalidis, S. et al., eds), Aristotle University of Thessaloniki, pp. 233–254.
 Merrifield, R. and Simmons, H. (1989) Topological Methods in Chemistry, Wiley.
 Trinks, M. (2013) The Merrifield–Simmons conjecture holds for bipartite graphs. J. Graph Theory 72 478–486.