%0 Journal Article %A Amira Ghorbel %A Hatem Hamrouni %T Discrete Cocompact Subgroups of the Five-Dimensional Connected and Simply Connected Nilpotent Lie Groups %J Symmetry, integrability and geometry: methods and applications %D 2009 %V 5 %U http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a19/ %G en %F SIGMA_2009_5_a19