@article{701398,
     title = {The index of transversally elliptic complexes},
     booktitle = {Proceedings of the Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1985},
     pages = {[165]-175},
     mrnumber = {MR0853139},
     zbl = {0602.58040},
     url = {http://dml.mathdoc.fr/item/701398}
}

Nestke, A.; Zickermann, F. The index of transversally elliptic complexes, dans Proceedings of the Winter School "Geometry and Physics", GDML_Books,  (1985), pp. [165]-175. http://gdmltest.u-ga.fr/item/701398/