TY - JOUR AU - Indranil Biswas AU - Frank Neumann TI - Atiyah sequences, connections and characteristic forms for principal bundles over groupoids and stacks JO - Comptes Rendus. Mathématique PY - 2014 SP - 59 EP - 64 VL - 352 IS - 1 PB - Elsevier DO - 10.1016/j.crma.2013.10.038 LA - en ID - CRMATH_2014__352_1_59_0 ER -