1. An introduction to matching polynomials;Farrell;J. Comb. Theory B.,1979
2. On the theory of the matching polynomial;Godsil;J. Graph Theory,1981
3. An Introduction to Combinatorial Analysis;Riordan,1980
4. A survey of the unifying effects of F-polynomials in combinatorics and graph theory;Farrell;Proc. Fourth Yugoslav Seminar in Graph Theory, Nov. Sad.,1983
5. Some general classes of comatching graphs;Farrell;Int. J. Math. Math Sci.,1987