@article{FORUM_1991__3_2_186412,
     author = {Manfred Dugas and Bernhard Thom\'e},
     title = {The {Functor} {Bext} under the {Negation} of {CH.}},
     journal = {Forum mathematicum},
     pages = {23--34},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1991},
     zbl = {0723.20033},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1991__3_2_186412/}
}