@article{10_21136_CMJ_1975_101360,
     author = {\v{S}vec, Alois},
     title = {Several new characterizations of the sphere},
     journal = {Czechoslovak Mathematical Journal},
     pages = {645--652},
     year = {1975},
     volume = {25},
     number = {4},
     doi = {10.21136/CMJ.1975.101360},
     mrnumber = {0388293},
     zbl = {0317.53054},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1975.101360/}
}