TY - JOUR AU - Yaroslav Vorobets TI - On faithful actions of groups and semigroups by orientation-preserving plane isometries JO - Algebra and discrete mathematics PY - 2003 SP - 118 EP - 125 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ADM_2003_4_a9/ LA - en ID - ADM_2003_4_a9 ER -