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@article{JRAM_1997__483_153889, author = {N.J. Young and V.V. Peller}, title = {Continuity properties of best analytic approximation.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {1--22}, publisher = {mathdoc}, volume = {483}, year = {1997}, zbl = {0890.47016}, url = {http://geodesic.mathdoc.fr/item/JRAM_1997__483_153889/} }
N.J. Young; V.V. Peller. Continuity properties of best analytic approximation.. Journal für die reine und angewandte Mathematik, Tome 483 (1997), pp. 1-22. http://geodesic.mathdoc.fr/item/JRAM_1997__483_153889/