GitLab

This one: K-Homology, Assembly and Rigidity Theorems for Relative Eta Invariants

To be found here: http://www.personal.psu.edu/ndh2/math/Papers_files/Higson,%20Roe%20-%202008%20-%20K-homology,%20assembly%20and%20rigidity%20theorems%20for%20relative%20eta-invariants.pdf

Some notes on this seem appropiate