@article{02206530, title = {The index of projective families of elliptic operators.}, journal = {Geometry \& Topology}, volume = {5}, year = {2005}, pages = {341-373}, doi = {10.2140/gt.2005.9.341}, zbl = {1083.58021}, language = {en}, url = {http://dml.mathdoc.fr/item/02206530} }
Mathai, Varghese; Melrose, Richard B.; Singer, Isadore M. The index of projective families of elliptic operators.. Geometry & Topology, Tome 5 (2005) pp. 341-373. doi : 10.2140/gt.2005.9.341. http://gdmltest.u-ga.fr/item/02206530/