@article{TMF_1987_73_2_a12,
     author = {A. N. Leznov},
     title = {Equivalence of four-dimensional self-duality equations and the continuum analog of the principal chiral field problem},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {302--307},
     publisher = {mathdoc},
     volume = {73},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_73_2_a12/}
}