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@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/} }
J. L. Walsh. On Approximation to an Analytic Function by Rational Functions of Best Approximation.. Mathematische Zeitschrift, Tome 38 (1934), pp. 163-176. http://geodesic.mathdoc.fr/item/MZ_1934__38_168494/