@article{JRAM_1979__305_152071,
     author = {Ursel Kiehne},
     title = {Bounded products in the theory of valued fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {9--36},
     publisher = {mathdoc},
     volume = {305},
     year = {1979},
     zbl = {0423.12022},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1979__305_152071/}
}