@article{ZNSL_1989_172_a7,
     author = {V. G. Mikhalev},
     title = {On complete integrability of the $O(3)$-field in the class of rapidly decreasing functions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {99--104},
     publisher = {mathdoc},
     volume = {172},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1989_172_a7/}
}