@article{ELMA_1964__19_140787,
     author = {G\'abor Fejes T\'oth},
     title = {\"Uber die {Blockierungszahl} einer {Kreispackung.}},
     journal = {Elemente der Mathematik},
     pages = {49--53},
     publisher = {mathdoc},
     volume = {19},
     year = {1964},
     zbl = {0117.39601},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1964__19_140787/}
}