@article{ELMA_1973__28_141116,
     author = {D. Dorninger},
     title = {\"Uberdeckung der {Ebene} durch inkongruente {Kreise.}},
     journal = {Elemente der Mathematik},
     pages = {105--107},
     publisher = {mathdoc},
     volume = {28},
     year = {1973},
     zbl = {0261.52010},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1973__28_141116/}
}