@article{GDZPPN002332868, title = {Uniform approximation by polynomials in two functions.}, journal = {Mathematische Annalen}, volume = {283}, year = {1989}, pages = {529-536}, url = {http://dml.mathdoc.fr/item/GDZPPN002332868} }
O'Farrell, A.G.; Preskenis, K.J. Uniform approximation by polynomials in two functions.. Mathematische Annalen, Tome 283 (1989) pp. 529-536. http://gdmltest.u-ga.fr/item/GDZPPN002332868/