@article{JRAM_1968__230_150850,
     author = {Harro Walk},
     title = {\"Uber das {Randverhalten} zuf\"alliger {Potenzreihen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {66--103},
     publisher = {mathdoc},
     volume = {230},
     year = {1968},
     zbl = {0159.46001},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1968__230_150850/}
}