@article{AMA_2005__2005_1_125418,
     author = {Kadison, Lars},
     title = {An action-free characterization of weak {Hopf-Galois} extensions.},
     journal = {AMA. Algebra Montpellier Announcements [electronic only]},
     publisher = {mathdoc},
     volume = {2005},
     number = {1},
     year = {2005},
     zbl = {1078.16043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMA_2005__2005_1_125418/}
}