@article{IM2_2005_69_3_a0,
     author = {A. G. Baskakov and I. A. Krishtal},
     title = {Harmonic analysis of causal operators and their spectral properties},
     journal = {Izvestiya. Mathematics},
     pages = {439--486},
     year = {2005},
     volume = {69},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2005_69_3_a0/}
}