@article{PORMA_1997__54_1_47929,
     author = {Popescu, N. and Zaharescu, A.},
     title = {On the main invariant of an element over a local field.},
     journal = {Portugaliae mathematica},
     pages = {73--83},
     publisher = {mathdoc},
     volume = {54},
     number = {1},
     year = {1997},
     zbl = {0894.11045},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1997__54_1_47929/}
}