@article{IVM_2016_2_a4,
     author = {A. A. Koshelev},
     title = {The {Landau{\textendash}Kolmogorov} problem for the {Laplace} operator on a~ball},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {31--39},
     year = {2016},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2016_2_a4/}
}