@article{IM2_1973_7_6_a1,
     author = {S. V. Vostokov},
     title = {An orthogonal basis of a~local field},
     journal = {Izvestiya. Mathematics},
     pages = {1225--1237},
     year = {1973},
     volume = {7},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1973_7_6_a1/}
}