1. I. Gutman, F. Harary, Generalizations of the Matching polynomial. Utilitas Mathematica 24, 97–106 (1983)
2. G. Ferrin, Independence polynomials, Master Dissertation, University of South Carolina - Columbia (2014)
3. L. Kaskowitz, The independence fractal of a graph, Master Dissertation (2003)
4. O. Jones, Spectra of Simple Graphs, Whitman College (2013)
5. J.I. Brown, C.A. Hickman, R.J. Nowakowski, The independence fractal of a graph. J. Combinatorial Theor. Ser. B 87, 209–230 (2003)