@article{ADM_2003_3_a5,
     author = {George Szeto and Lianyong Xue},
     title = {The commutator {Hopf} {Galois} extensions},
     journal = {Algebra and discrete mathematics},
     pages = {89--94},
     publisher = {mathdoc},
     number = {3},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2003_3_a5/}
}