@article{IVM_2021_12_a4,
     author = {M. G. Magomed-Kasumov},
     title = {Sobolev orthogonal systems with two discrete points and {Fourier} series},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {56--66},
     publisher = {mathdoc},
     number = {12},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2021_12_a4/}
}