@article{10_4064_sm_14_2_214_231,
     author = {J. Kurzweil},
     title = {On approximation in real {Banach} spaces},
     journal = {Studia Mathematica},
     pages = {214--231},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1953},
     doi = {10.4064/sm-14-2-214-231},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-14-2-214-231/}
}