@article{UFA_2021_13_2_a0,
     author = {A. B. Borisov},
     title = {On integrability of $O(3)$--model},
     journal = {Ufa mathematical journal},
     pages = {3--7},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2021_13_2_a0/}
}