%0 Journal Article %A Kanehisa Takasaki %A Takashi Takebe %T Quasi-classical limit of KP hierarchy, $W$-symmetries and free fermions %J Zapiski Nauchnykh Seminarov POMI %D 1996 %P 295-303 %V 235 %U http://geodesic.mathdoc.fr/item/ZNSL_1996_235_a16/ %G en %F ZNSL_1996_235_a16