Hawkins, A., A. Skalski, S. White, and J. Zacharias. “On Spectral Triples on Crossed Products Arising From Equicontinuous Actions”. Mathematica Scandinavica 113, no. 2 (December 1, 2013): 262–291. Accessed July 24, 2026. https://journals.msp.org/mscand/article/view/437.