@article{AA_2007_19_5_a4,
     author = {Yu. L. Ershov},
     title = {Tame and purely wild extensions of valued fields},
     journal = {Algebra i analiz},
     pages = {124--136},
     publisher = {mathdoc},
     volume = {19},
     number = {5},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2007_19_5_a4/}
}