@article{CMUC_1990__31_1_a13,
     author = {Pt\'ak, Pavel},
     title = {Measure-determined enlargements of {Boolean} $\sigma$-algebras},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {105--107},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {1990},
     mrnumber = {1056176},
     zbl = {0696.06007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1990__31_1_a13/}
}