TY - JOUR AU - Rafa/l PikuĊ‚a TI - On enveloping semigroups of nilpotent group actions generated by unipotent affine transformations of the torus JO - Studia Mathematica PY - 2010 SP - 133 EP - 153 VL - 201 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm201-2-2/ DO - 10.4064/sm201-2-2 LA - en ID - 10_4064_sm201_2_2 ER -