@article{10_4064_am_16_3_475_483,
     author = {R. Smarzewski},
     title = {On weak {Chebyshev} subspaces and {Chebyshev} approximation by their elements},
     journal = {Applicationes Mathematicae},
     pages = {475--483},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {1977},
     doi = {10.4064/am-16-3-475-483},
     zbl = {0418.41021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-16-3-475-483/}
}