@article{DMTCS_2011_special_260_a0,
     author = {Aguiar, Marcelo and Lauve, Aaron},
     title = {Lagrange's {Theorem} for {Hopf} {Monoids} in {Species}},
     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.2887},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.2887/}
}