@article{IM2_1977_11_4_a8,
     author = {R. J. Grabovskaya and V. I. Kononenko and V. B. Osipov},
     title = {On a~family of generalized shift operators},
     journal = {Izvestiya. Mathematics},
     pages = {865--888},
     year = {1977},
     volume = {11},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1977_11_4_a8/}
}