@article{AM2_1981__22_136865,
     author = {Charles B. Dunham},
     title = {Rational approximation on subsets, {II.} {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {115--116},
     publisher = {mathdoc},
     volume = {22},
     year = {1981},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136865/}
}