@article{GDZPPN002033097, title = {Rational approximation on subsets, II.}, journal = {Aequationes mathematicae}, volume = {22}, year = {1981}, pages = {165-172}, zbl = {0492.41039}, url = {http://dml.mathdoc.fr/item/GDZPPN002033097} }
Dunham, Charles B. Rational approximation on subsets, II.. Aequationes mathematicae, Tome 22 (1981) pp. 165-172. http://gdmltest.u-ga.fr/item/GDZPPN002033097/