@article{MZ_1934__38_168494,
     author = {J. L. Walsh},
     title = {On {Approximation} to an {Analytic} {Function} by {Rational} {Functions} of {Best} {Approximation.}},
     journal = {Mathematische Zeitschrift},
     pages = {163--176},
     publisher = {mathdoc},
     volume = {38},
     year = {1934},
     zbl = {0008.11203},
     url = {http://geodesic.mathdoc.fr/item/MZ_1934__38_168494/}
}