@article{GDZPPN002234491, title = {Separating families for semi-algebraic sets.}, journal = {Manuscripta mathematica}, volume = {79}, year = {1993}, pages = {73-80}, zbl = {0803.14030}, url = {http://dml.mathdoc.fr/item/GDZPPN002234491} }
Marshall, Murray A. Separating families for semi-algebraic sets.. Manuscripta mathematica, Tome 79 (1993) pp. 73-80. http://gdmltest.u-ga.fr/item/GDZPPN002234491/