1. Properties and applications of a class of polynomials;Bedrosian;J. Franklin Inst.,1973
2. The tree polynomial of a graph;Farrell;J. Combinatorics, Information and System Sciences,1979
3. On a general class of graph polynomials;Farrell,1973
4. On the number of spanning trees in finite graphs;Sedláček;Casopis pro Pestovani Matermatiky,1969