A Quasisymmetric Function Generalization of the Chromatic Symmetric Function. - Brandon Humpert (Electron. J. Comb., 2011)

Polynomials associated with graph coloring and orientations. - Brandon Humpert (2011)

The Incidence Hopf Algebra of Graphs. - Brandon Humpert; Jeremy L. Martin (SIAM J. Discret. Math., 2012)