@article{IVM_2021_5_a4,
     author = {B. M. Darinskii and A. V. Loboda and D. S. Saiko},
     title = {On some topological characteristics of harmonic polynomials},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {23--32},
     year = {2021},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2021_5_a4/}
}