Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1971__7_2_a3, author = {Kope\v{c}ek, Old\v{r}ich}, title = {Das {Produkt} von {H\"ullenstrukturen}}, journal = {Archivum mathematicum}, pages = {87--98}, publisher = {mathdoc}, volume = {07}, number = {2}, year = {1971}, mrnumber = {0300956}, zbl = {0259.08006}, language = {ge}, url = {http://geodesic.mathdoc.fr/item/ARM_1971__7_2_a3/} }
Kopeček, Oldřich. Das Produkt von Hüllenstrukturen. Archivum mathematicum, Tome 07 (1971) no. 2, pp. 87-98. http://geodesic.mathdoc.fr/item/ARM_1971__7_2_a3/