TY - JOUR AU - J.-P. Magnot AU - V. N. Rubtsov TI - On the~Kadomtsev-Petviashvili hierarchy in an~extended class of formal pseudo-differential operators JO - Teoretičeskaâ i matematičeskaâ fizika PY - 2021 SP - 458 EP - 488 VL - 207 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_2021_207_3_a8/ LA - ru ID - TMF_2021_207_3_a8 ER -