@article{GDZPPN002218682, title = {Polyhomogeneous Maps and Best Local Approximations of Degree ... .}, journal = {Manuscripta mathematica}, volume = {17}, year = {1975}, pages = {1-32}, zbl = {0306.46057}, url = {http://dml.mathdoc.fr/item/GDZPPN002218682} }
Findley, David F. Polyhomogeneous Maps and Best Local Approximations of Degree ... .. Manuscripta mathematica, Tome 17 (1975) pp. 1-32. http://gdmltest.u-ga.fr/item/GDZPPN002218682/