@article{MO_2021_4_a9,
     author = {E. G. Smoljanova},
     title = {Geometric pattern as a limit cycle},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {63--68},
     year = {2021},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2021_4_a9/}
}