@article{GDZPPN002109360, title = {A mod k index theorem.}, journal = {Inventiones mathematicae}, volume = {110}, year = {1992}, pages = {283-300}, zbl = {0760.58039}, url = {http://dml.mathdoc.fr/item/GDZPPN002109360} }
Freed, Daniel S.; Melrose, Richard B. A mod k index theorem.. Inventiones mathematicae, Tome 110 (1992) pp. 283-300. http://gdmltest.u-ga.fr/item/GDZPPN002109360/