TY - JOUR AU - Amira Ghorbel AU - Hatem Hamrouni TI - Discrete Cocompact Subgroups of the Five-Dimensional Connected and Simply Connected Nilpotent Lie Groups JO - Symmetry, integrability and geometry: methods and applications PY - 2009 VL - 5 UR - http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a19/ LA - en ID - SIGMA_2009_5_a19 ER -