1. Marcelo Aguiar, Federico Ardila, Hopf monoids and generalized permutahedra. eprint arXiv:1709.07504.
2. Combinatorial Hopf algebras and generalized dehn-sommerville relations;Aguiar;Compos. Math.,2006
3. Monoidal Functors, Species and Hopf Algebras;Aguiar,2010
4. Hopf monoids in the category of species;Aguiar;Contemp. Math.,2013
5. The subchromatic number of a graph;Albertson,1989