%0 Journal Article %A Pierre Will %T Lagrangian decomposability of some two-generator subgroups of $ \mathrm{PU}(2,1)$ %J Comptes Rendus. Mathématique %D 2005 %P 353-358 %V 340 %N 5 %I Elsevier %R 10.1016/j.crma.2005.01.008 %G en %F CRMATH_2005__340_5_353_0