@article{GDZPPN002416387,
title = {Approximation with Restricted Spectra.},
journal = {Mathematische Zeitschrift},
volume = {142},
year = {1975},
pages = {289-297},
zbl = {0295.47028},
url = {http://dml.mathdoc.fr/item/GDZPPN002416387}
}
Chui, C.K.; Smith, P.W.; Ward, J.D. Approximation with Restricted Spectra.. Mathematische Zeitschrift, Tome 142 (1975) pp. 289-297. http://gdmltest.u-ga.fr/item/GDZPPN002416387/