@article{CRMATH_2003__336_9_763_0, author = {McCrory, Clint and Parusi\'nski, Adam}, title = {Virtual {Betti} numbers of real algebraic varieties}, journal = {Comptes Rendus. Math\'ematique}, pages = {763--768}, publisher = {Elsevier}, volume = {336}, number = {9}, year = {2003}, doi = {10.1016/S1631-073X(03)00168-7}, language = {en}, url = {http://archive.numdam.org/articles/10.1016/S1631-073X(03)00168-7/} }