An introduction to chromatic polynomials

Balas, 1965, An Additive Algorithm for Solving Linear Programs with Zero-One Variables, Operations Res., 13, 517, 10.1287/opre.13.4.517

Birkhoff, 1912, A Determinantal Formula for the Number of Ways of Colouring a Map, Ann. of Math., 14, 42, 10.2307/1967597

Birkhoff, 1913, The Reducibility of Maps, Amer. J. Math., 35, 115, 10.2307/2370276

Birkhoff, 1930, On the Number of Ways of Colouring a Map, 2, 83

Rota, 1964, On the Foundations of Combinational theory. I. Theory of Möbius Functions, Z. Wahrscheinlichkeitstheorie und Verw. Gebiete, 2, 340, 10.1007/BF00531932

Riordan, 1958

Whitney, 1932, A Logical Expansion in Mathematics, Bull. Amer. Math. Soc., 38, 572, 10.1090/S0002-9904-1932-05460-X

Whitney, 1932, The Coloring of Graphs, Ann. of Math., 33, 688, 10.2307/1968214

Zykov, 1952, On Some Properties of Linear Complexes, Amer. Math. Soc. Transl., No. 79

Zykov, 1949, Mat. Sb., 24, 163