@article{IM2_1968_2_3_a7,
     author = {A. F. Leont'ev},
     title = {A method for the solution of an equation of infinite order},
     journal = {Izvestiya. Mathematics},
     pages = {639--663},
     year = {1968},
     volume = {2},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1968_2_3_a7/}
}