@article{JRAM_1969__234_150907,
     author = {K. Barth and W.J. Schneider},
     title = {On a problem of {Bagemihl} and {Erd\"os} concerning the distribution of zeros of an annular function.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {179--183},
     publisher = {mathdoc},
     volume = {234},
     year = {1969},
     zbl = {0169.09301},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1969__234_150907/}
}