@article{CM_1968__19_4_299_0,
     author = {Stam, A. J.},
     title = {Laws of large numbers for functions of random walks with positive drift},
     journal = {Compositio Mathematica},
     pages = {299--333},
     publisher = {Wolters-Noordhoff Publishing},
     volume = {19},
     number = {4},
     year = {1968},
     mrnumber = {243627},
     zbl = {0239.60029},
     language = {en},
     url = {http://www.numdam.org/item/CM_1968__19_4_299_0/}
}