1. Chromatic polynomials;Birkhoff;Trans. Amer. Math. Soc.,1946
2. Limits of zeroes of recursively defined polynomials;Beraha,1975
3. Limits of zeroes of recursively defined families of polynomials;Beraha,1978
4. S. Beraha, “Infinite Non-Trivial Families of Maps and Chromials,” Thesis, Johns Hopkins University.
5. Chromials;Tutte,1975