Barlak, Selçuk, and Gábor Szabó. “On Diagonal Quasi-Free Automorphisms of Simple Cuntz-Krieger Algebras”. MATHEMATICA SCANDINAVICA 125, no. 2 (October 19, 2019): 210-226. Accessed April 1, 2020. https://www.mscand.dk/article/view/114823.