- On some colored Eulerian quasisymmetric functions,
preprint, 2013.
- On the descent polynomial of signed multipermutations,
submitted, arXiv:1310.6726.
- Graph homomorphisms between trees,
with Péter Csikvári,
submitted, arXiv:1307.6721.
- Positivity properties of Jacobi-Stirling numbers and generalized Ramanujan polynomials,
with Jiang Zeng,
Advances in Applied Mathematics, 53 (2014), 12-27.
- On some generalized q-Eulerian polynomials,
Electronic Journal of Combinatorics, 20(1) (2013), #P55.
- On some generalized q-Eulerian polynomials (extended abstract),
FPSAC 2013 Paris, France.
- Jacobi-Stirling polynomials and P-partitions,
with Ira M. Gessel and Jiang Zeng,
European Journal of Combinatorics, 33 (2012), 1987-2000.
- A symmetrical q-Eulerian identity,
with Guo-Niu Han and Jiang Zeng,
Séminaire Lotharingien de Combinatoire, B67c (2012), 11 pp.
- On the number of congruence classes of paths,
with Jiang Zeng,
Discrete Mathematics, 312 (2012), 1300-1307.