@article{MS2_1995__76_2_167338,
     author = {Teresa Crespo},
     title = {C4-Extensions of {Sn} as {Galois} {Groups.}},
     journal = {Mathematica Scandinavica},
     pages = {214--220},
     publisher = {mathdoc},
     volume = {76},
     number = {2},
     year = {1995},
     zbl = {0841.12002},
     url = {http://geodesic.mathdoc.fr/item/MS2_1995__76_2_167338/}
}