TY - JOUR AU - Yu. M. Polyakova TI - The categories $P_d$ and $S_d$ of two-dimensional $d$-log-terminal pairs JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1999 SP - 849 EP - 851 VL - 54 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1999_54_4_a16/ LA - en ID - RM_1999_54_4_a16 ER -