@article{CSHM_1991_2_1__31_0,
     author = {Risler, Jean-Jacques},
     title = {G\'eom\'etrie alg\'ebrique r\'eelle et composantes connexes},
     journal = {Cahiers du s\'eminaire d'histoire des math\'ematiques},
     pages = {31--40},
     publisher = {Institut Henri Poincar\'e, S\'eminaire d'histoire des math\'ematiques : Paris},
     volume = {2e s{\'e}rie, 1},
     year = {1991},
     mrnumber = {1122203},
     zbl = {0743.14044},
     language = {fr},
     url = {http://www.numdam.org/item/CSHM_1991_2_1__31_0/}
}