@article{AIHPB_2011__47_1_130_0,
     author = {Schapira, Bruno and Young, Robert},
     title = {Windings of planar random walks and averaged {Dehn} function},
     journal = {Annales de l'I.H.P. Probabilit\'es et statistiques},
     pages = {130--147},
     publisher = {Gauthier-Villars},
     volume = {47},
     number = {1},
     year = {2011},
     doi = {10.1214/10-AIHP365},
     mrnumber = {2779400},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1214/10-AIHP365/}
}