@article{SLC_2007-2010_57_a3,
     author = {Mireille Bousquet-M\'elou},
     title = {Discrete {Excursions}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2007-2010},
     volume = {57},
     url = {http://geodesic.mathdoc.fr/item/SLC_2007-2010_57_a3/}
}