@article{PS_2012__16__324_0,
     author = {Lachal, Aim\'e},
     title = {Sojourn time in $\mathbb {Z}^{+}$ for the {Bernoulli} random walk on $\mathbb {Z}$},
     journal = {ESAIM: Probability and Statistics},
     pages = {324--351},
     publisher = {EDP-Sciences},
     volume = {16},
     year = {2012},
     doi = {10.1051/ps/2010013},
     zbl = {1275.60046},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ps/2010013/}
}