@article{CM_1969__21_4_383_0,
     author = {Stam, A. J.},
     title = {Renewal theory in $r$ dimensions {(I)}},
     journal = {Compositio Mathematica},
     pages = {383--399},
     publisher = {Wolters-Noordhoff Publishing},
     volume = {21},
     number = {4},
     year = {1969},
     mrnumber = {261714},
     zbl = {0192.54601},
     language = {en},
     url = {http://www.numdam.org/item/CM_1969__21_4_383_0/}
}