@article{AIF_1999__49_3_905_0,
     author = {Delorme, Charles and Heydemann, Marie-Claude},
     title = {On a problem of walks},
     journal = {Annales de l'Institut Fourier},
     pages = {905--919},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {49},
     number = {3},
     year = {1999},
     doi = {10.5802/aif.1698},
     mrnumber = {2000h:05096},
     zbl = {0922.05031},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/aif.1698/}
}