@article{CMFD_2022_68_4_a2,
     author = {S. V. Volkov},
     title = {Construction of the planar vector fields with~nonsimple critical point of~prescribed topological structure},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {575--595},
     publisher = {mathdoc},
     volume = {68},
     number = {4},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2022_68_4_a2/}
}