@article{TMF_2013_174_1_a10,
     author = {G. F. Helminck and A. G. Helminck and E. A. Panasenko},
     title = {Integrable deformations in the~algebra of pseudodifferential},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {154--176},
     year = {2013},
     volume = {174},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2013_174_1_a10/}
}