@article{JRAM_1968__229_150839, author = {Robert L. Ellis}, title = {The state of a bounded linear operator on a {non-Archimedian} normed space.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {155--162}, publisher = {mathdoc}, volume = {229}, year = {1968}, zbl = {0161.34402}, url = {http://geodesic.mathdoc.fr/item/JRAM_1968__229_150839/} }