@article{10_4171_dm_6,
     author = {O.T. Izhboldin},
     title = {On the nonexcellence of field extensions $F(\pi)/F$},
     journal = {Documenta mathematica},
     pages = {127--136},
     year = {1996},
     volume = {1},
     doi = {10.4171/dm/6},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/6/}
}