Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1973__14_2_a13, author = {Frol{\'\i}k, Zden\v{e}k}, title = {Hyper-extensions of $\sigma$-algebras}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {361--375}, publisher = {mathdoc}, volume = {14}, number = {2}, year = {1973}, mrnumber = {0346115}, zbl = {0276.28004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1973__14_2_a13/} }
Frolík, Zdeněk. Hyper-extensions of $\sigma$-algebras. Commentationes Mathematicae Universitatis Carolinae, Tome 14 (1973) no. 2, pp. 361-375. http://geodesic.mathdoc.fr/item/CMUC_1973__14_2_a13/