@article{GDZPPN002418797,
title = {The Degree of Approximation by Rational Functions with Fixed Poles.},
journal = {Mathematische Zeitschrift},
volume = {154},
year = {1977},
pages = {161-166},
zbl = {0331.30028},
url = {http://dml.mathdoc.fr/item/GDZPPN002418797}
}
Andersson, Jan-Erik.; Ganelius, Tord. The Degree of Approximation by Rational Functions with Fixed Poles.. Mathematische Zeitschrift, Tome 154 (1977) pp. 161-166. http://gdmltest.u-ga.fr/item/GDZPPN002418797/