Giordano, Thierry, Ian F. Putnam, and Christian F. Skau. “$K$-Theory and Asymptotic Index for Certain Almost One-to-One Factors”. MATHEMATICA SCANDINAVICA 89, no. 2 (December 1, 2001): 297–319. Accessed April 27, 2024. https://www.mscand.dk/article/view/14343.