TY - JOUR AU - A. M. Semikhatov TI - Free-field resolutions of unitary representations of the $N=2$ Virasoro algebra:~I JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1999 SP - 89 EP - 109 VL - 121 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1999_121_1_a5/ LA - ru ID - TMF_1999_121_1_a5 ER -