@article{JRAM_1972__257_151265,
     author = {Gerd Blind},
     title = {Zug\"angliche {Unterdeckungen} der {Ebene} durch kongruente {Kreise.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {29--46},
     publisher = {mathdoc},
     volume = {257},
     year = {1972},
     zbl = {0241.52003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1972__257_151265/}
}