@article{TMF_2021_207_3_a8,
     author = {J.-P. Magnot and V. N. Rubtsov},
     title = {On {the~Kadomtsev-Petviashvili} hierarchy in an~extended class of formal pseudo-differential operators},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {458--488},
     publisher = {mathdoc},
     volume = {207},
     number = {3},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2021_207_3_a8/}
}