@article{IM2_2005_69_5_a3,
     author = {S. V. Kozyrev and A. Yu. Khrennikov},
     title = {Pseudodifferential operators on ultrametric spaces and ultrametric wavelets},
     journal = {Izvestiya. Mathematics },
     pages = {989--1003},
     publisher = {mathdoc},
     volume = {69},
     number = {5},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2005_69_5_a3/}
}