Monoidal functors, species and Hopf algebras (with Marcelo Aguiar, Preliminary version of May 2009)
Coxeter groups and Hopf algebras (with Marcelo Aguiar)
Quantum groups and differential forms
Symplectic operad geometry and graph homology
Projections maps, shellings and duality
The cd-index of the Boolean lattice
Maximizing the descent statistic (with Richard Ehrenborg)