@article{PORMA_1981__40_2_115446,
     author = {Dickmann, M.A.},
     title = {Sur les ouverts semi-alg\'ebriques d'une cl\^oture r\'eelle},
     journal = {Portugaliae mathematica},
     pages = {231--238},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1981},
     mrnumber = {0819887},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1981__40_2_115446/}
}