TY - JOUR AU - Yu. G. Safarov TI - Asymptotics of the spectrum of pseudo-differential operator with periodic bicharacteristics JO - Zapiski Nauchnykh Seminarov POMI PY - 1986 SP - 94 EP - 104 VL - 152 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_1986_152_a9/ LA - ru ID - ZNSL_1986_152_a9 ER -