@article{article3a50463a,
title   = {Nonhomogeneous random walks systems on Z},
author = {Lebensztayn, Élcio and Machado, Fábio Prates and Martinez, Mauricio Zuluaga},
year = {2010},
doi = {10.1017/S0021900200006811},
journal   = {Journal of Applied Probability}
}