@article{TMF_2012_171_2_a9,
     author = {K. Takasaki and T. Takebe},
     title = {An~$\hbar$-dependent formulation of {the~Kadomtsev{\textendash}Petviashvili} hierarchy},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {303--311},
     year = {2012},
     volume = {171},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2012_171_2_a9/}
}