@article{DAN_1989_305_2_a17,
     author = {Yu. A. Bondarenko},
     title = {A variational method for constructing inhomogeneous difference},
     journal = {Doklady Akademii Nauk},
     pages = {325--329},
     publisher = {mathdoc},
     volume = {305},
     number = {2},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_305_2_a17/}
}