@article{BSMF_1968__96__289_0,
     author = {Ferrier, Jean-Pierre},
     title = {Ensembles spectraux et approximation polynomiale pond\'er\'ee},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {289--335},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {96},
     year = {1968},
     doi = {10.24033/bsmf.1670},
     mrnumber = {39 #3198},
     zbl = {0169.09101},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.1670/}
}