Limits of chromatic zeros of some families of maps

Chromatic polynomials

George D. Birkhoff, Drew Lewis · Transactions of the American Mathematical Society · 1946 · 190 citations · Full text

On chromatic polynomials and the golden ratio

W. T. Tutte · Journal of Combinatorial Theory · 1970 · 98 citations

Is the four-color conjecture almost false?

Sami Beraha, J. Kâhane · Journal of Combinatorial Theory Series B · 1979 · 56 citations

Four-color Conjecture, Colorimetry, Discrete Mathematics +2