@article{GDZPPN002228734, title = {On the seperation of basic semialgebraic sets by polynomials.}, journal = {Manuscripta mathematica}, volume = {61}, year = {1988}, pages = {497-508}, zbl = {0647.14009}, url = {http://dml.mathdoc.fr/item/GDZPPN002228734} }
Bröcker, Ludwig. On the seperation of basic semialgebraic sets by polynomials.. Manuscripta mathematica, Tome 61 (1988) pp. 497-508. http://gdmltest.u-ga.fr/item/GDZPPN002228734/