@article{IM2_2010_74_6_a3,
     author = {A. I. Kozko and A. S. Pechentsov},
     title = {The spectral function of a~singular differential operator of order~$2m$},
     journal = {Izvestiya. Mathematics },
     pages = {1205--1224},
     publisher = {mathdoc},
     volume = {74},
     number = {6},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2010_74_6_a3/}
}