1. K. Behrend, Cohomology of stacks, In: Arbarello, Ellingsrud, Goettsche (Eds.), Intersection Theory and Moduli, ICTP Lecture Notes Series, vol. 19, 2004, pp. 249–294.
2. S1-bundles and gerbes over differentiable stacks;Behrend;C. R. Acad. Sci. Paris Ser. I Math.,2003
3. L. Breen, W. Messing, Differential geometry of gerbes, Preprint, arXiv:math.AG/0106083.
4. J.-L. Brylinski, Loop spaces, characteristic classes and geometric quantization, Progress in Mathematics, vol. 107, Birkhäuser, Boston, 1993.
5. The equivariant Chern character for non-compact Lie groups;Getzler;Adv. in Math.,1994