@article{CMH_1967__42_139342,
     author = {H. Hadwiger},
     title = {\"Uberdeckung der euklidischen {Sph\"are} mit kongruenten {Punktmengen.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {249--258},
     publisher = {mathdoc},
     volume = {42},
     year = {1967},
     zbl = {0173.24401},
     url = {http://geodesic.mathdoc.fr/item/CMH_1967__42_139342/}
}