@article{SLC_2003-2005_50_a7,
     author = {Edward E. Bender and Gregory F. Lawler and Robin Pemantle and Herbert S. Wilf},
     title = {Irreducible {Compositions} and the {First} {Return} to the {Origin} of a {Random} {Walk}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2003-2005},
     volume = {50},
     url = {http://geodesic.mathdoc.fr/item/SLC_2003-2005_50_a7/}
}