@article{DM_1996_8_1_a5,
     author = {N. V. Il'chenko},
     title = {A completeness criterion for nonhomogeneous functions with delays},
     journal = {Diskretnaya Matematika},
     pages = {86--98},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1996_8_1_a5/}
}