TY - JOUR AU - Mohammed Larbi Labbi TI - On Gauss–Bonnet Curvatures JO - Symmetry, integrability and geometry: methods and applications PY - 2007 VL - 3 UR - http://geodesic.mathdoc.fr/item/SIGMA_2007_3_a117/ LA - en ID - SIGMA_2007_3_a117 ER -