@article{CMFD_2022_68_1_a12,
     author = {Kh. M. Shadimetov and R. N. Mirzakabilov},
     title = {Optimal difference formulas in the {Sobolev} space},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {167--177},
     publisher = {mathdoc},
     volume = {68},
     number = {1},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2022_68_1_a12/}
}