@article{JRAM_1979__306_152101,
     author = {N. Sankaran and Ram Avtar},
     title = {Higher ramification in {Hensel} fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {185--191},
     publisher = {mathdoc},
     volume = {306},
     year = {1979},
     zbl = {0445.12014},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1979__306_152101/}
}