@article{SLC_2007-2008_58_a2,
     author = {Fr\'ed\'eric Chapoton},
     title = {Operads and {Algebraic} {Combinatorics} of {Trees}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2007-2008},
     volume = {58},
     url = {http://geodesic.mathdoc.fr/item/SLC_2007-2008_58_a2/}
}