1. Introduction to Combinatories;Berman,1972
2. The Art of Computer Programming;Knuth,1968
3. Formulas for Trees of Certain Networks via Key Subgraph Forms;Bedrosian,1964
4. The heights of Fibonacci polynomials and an associated function;Hoggatt;Fibonacci Quarterly,1967
5. On the number of spanning trees of finite graphs;Sedlacek;Casopis pro pestovani matematiky,1969