Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1977__18_2_a8, author = {Rosick\'y, Ji\v{r}{\'\i}}, title = {One obstruction for closedness}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {311--318}, publisher = {mathdoc}, volume = {18}, number = {2}, year = {1977}, mrnumber = {0470025}, zbl = {0359.18011}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1977__18_2_a8/} }
Rosický, Jiří. One obstruction for closedness. Commentationes Mathematicae Universitatis Carolinae, Tome 18 (1977) no. 2, pp. 311-318. http://geodesic.mathdoc.fr/item/CMUC_1977__18_2_a8/