@article{MM2_1997__93_4_156312,
     author = {Adam Parusinski and Zbigniew Szafraniec},
     title = {Algebraically constructible functions and signs of polynomials.},
     journal = {Manuscripta mathematica},
     pages = {443--456},
     publisher = {mathdoc},
     volume = {93},
     number = {4},
     year = {1997},
     zbl = {0913.14019},
     url = {http://geodesic.mathdoc.fr/item/MM2_1997__93_4_156312/}
}