@article{JRAM_1979__0307_0308_152110,
     author = {Mikio Niimura},
     title = {On boundary cluster sets.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {130--133},
     publisher = {mathdoc},
     volume = {0307_0308},
     year = {1979},
     zbl = {0395.30025},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1979__0307_0308_152110/}
}