@article{CMFD_2021_67_2_a6,
     author = {I. A. Kolesnikova},
     title = {On the construction of a variational principle for a certain class of differential-difference operator equations},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {316--323},
     publisher = {mathdoc},
     volume = {67},
     number = {2},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2021_67_2_a6/}
}