@article{TMF_2008_154_2_a4,
     author = {M. Yu. Balakhnev},
     title = {Superposition formulas for integrable vector evolution equations},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {261--267},
     publisher = {mathdoc},
     volume = {154},
     number = {2},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2008_154_2_a4/}
}