@article{IVM_2021_3_a0,
     author = {V. V. Volchkov and Vit. V. Volchkov},
     title = {Continuous extension of functions from a segment to functions in $\mathbb{R}^n$ with zero ball means},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--14},
     publisher = {mathdoc},
     number = {3},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2021_3_a0/}
}