An equivariant higher index theory and nonpositively curved manifolds. Shan, L. Journal of Functional Analysis, 255(6):1480–1496, September, 2008.
An equivariant higher index theory and nonpositively curved manifolds [link]Paper  doi  bibtex   
@article{shan_equivariant_2008,
	title = {An equivariant higher index theory and nonpositively curved manifolds},
	volume = {255},
	issn = {00221236},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S0022123608002255},
	doi = {10.1016/j.jfa.2008.06.025},
	language = {en},
	number = {6},
	urldate = {2016-07-16},
	journal = {Journal of Functional Analysis},
	author = {Shan, Lin},
	month = sep,
	year = {2008},
	pages = {1480--1496},
}

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