TY - JOUR TI - From the editors of this issue JO - Sbornik. Mathematics PY - 2017 SP - 1723 VL - 208 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_2017_208_12_a0/ LA - en ID - SM_2017_208_12_a0 ER -