%0 Journal Article %A P. Ney %A S. Wainger %T The renewal theorem for random walk in two-dimensional time %J Studia Mathematica %D 1972 %P 71-85 %V 44 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-44-1-71-85/ %R 10.4064/sm-44-1-71-85 %G en %F 10_4064_sm_44_1_71_85