@article{10_1007_s10587_011_0010_5,
     author = {Rataj, Jan and Zaj{\'\i}\v{c}ek, Lud\v{e}k},
     title = {Properties of distance functions on convex surfaces and applications},
     journal = {Czechoslovak Mathematical Journal},
     pages = {247--269},
     publisher = {mathdoc},
     volume = {61},
     number = {1},
     year = {2011},
     doi = {10.1007/s10587-011-0010-5},
     mrnumber = {2782772},
     zbl = {1224.53105},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-011-0010-5/}
}