@article{NUMA_1970__15_131980,
     author = {P.J. LAURENT and PHAM-DINH-TUAN},
     title = {Global {Approximation} of a {Compact} {Set} by {Elements} of a {Convex} {Set} in a {Normed} {Space.}},
     journal = {Numerische Mathematik},
     pages = {137--150},
     publisher = {mathdoc},
     volume = {15},
     year = {1970},
     zbl = {0198.21003},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1970__15_131980/}
}