@article{JIS_2017__20_1_a4,
     author = {Dershowitz,  Nachum},
     title = {Touchard's {Drunkard}},
     journal = {Journal of integer sequences},
     year = {2017},
     volume = {20},
     number = {1},
     zbl = {1352.05014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2017__20_1_a4/}
}