@article{NUMA_1977__28_132479,
     author = {M.R. Osborne and D.H. Anderson},
     title = {Discrete, {Nonlinear} {Approximation} {Problems} in {Polyhedral} {Norms.}},
     journal = {Numerische Mathematik},
     pages = {143--156},
     publisher = {mathdoc},
     volume = {28},
     year = {1977},
     zbl = {0342.65004},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1977__28_132479/}
}