@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/