@article{AA_1990_2_6_a6,
     author = {V. S. Vladimirov},
     title = {On the spectrum of some pseudodifferential operators over the field of $p$-adic numbers},
     journal = {Algebra i analiz},
     pages = {107--124},
     year = {1990},
     volume = {2},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1990_2_6_a6/}
}