DALETSKII, Yu. L.; TSYGAN, B. L. Operations on Hochschild and cyclic complexes. Methods of Functional Analysis and Topology, [S. l.], v. 5, n. 4, p. 62–86, 1999. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/108. Acesso em: 17 dec. 2025.