Kalyuzhnyi, A. A., and A. Daletskii. “Permutations in Tensor Products of Factors, and $L^{2}$ Cohomology of Configuration Spaces”. Methods of Functional Analysis and Topology, vol. 12, no. 4, Dec. 2006, pp. 341-52, https://zen.imath.kiev.ua/index.php/mfat/article/view/327.