@article{DMTCS_2011_special_260_a41,
     author = {Hivert, Florent and Mallet, Olivier},
     title = {Combinatorics of k-shapes and {Genocchi} numbers},
     journal = {Discrete mathematics & theoretical computer science},
     publisher = {mathdoc},
     volume = {DMTCS Proceedings vol. AO, 23rd International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2011)},
     year = {2011},
     doi = {10.46298/dmtcs.2928},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.2928/}
}