Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{KYB_1991__27_6_a3, author = {Thierfelder, J\"org}, title = {Separation theorems for sets in product spaces and equivalent assertions}, journal = {Kybernetika}, pages = {522--534}, publisher = {mathdoc}, volume = {27}, number = {6}, year = {1991}, mrnumber = {1150940}, zbl = {0778.46005}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KYB_1991__27_6_a3/} }
Thierfelder, Jörg. Separation theorems for sets in product spaces and equivalent assertions. Kybernetika, Tome 27 (1991) no. 6, pp. 522-534. http://geodesic.mathdoc.fr/item/KYB_1991__27_6_a3/