1. A. Carey, H. Grosse, J. Kaad, On a spectral flow formula for the homological index. Adv. Math. 289, 1106–1156 (2016). MR 3439708
2. A. Carey, F. Gesztesy, G. Levitina, R. Nichols, F. Sukochev, D. Zanin, The Limiting Absorption Principle for Massless Dirac Operators, Properties of Spectral Shift Functions, and an Application to the Witten Index of Non-fredholm Operators. Memoirs of the European Mathematical Society (to appear, 2022)
3. A. Carey, V. Gayral, J. Phillips, A. Rennie, F. Sukochev, Spectral flow for nonunital spectral triples. Canad. J. Math. 67(4), 759–794 (2015). MR 3361012
4. A. Carey, F. Gesztesy, D. Potapov, F. Sukochev, Y. Tomilov, On the Witten index in terms of spectral shift functions. J. Anal. Math. 132, 1–61 (2017). MR 3666804
5. A. Carey, V. Gayral, A. Rennie, F.A. Sukochev, Index theory for locally compact noncommutative geometries. Mem. Amer. Math. Soc. 231(1085), vi+130 (2014). MR 3221983