SHARKO, V. V. The $L^2$-invariants and flows on manifolds. Methods of Functional Analysis and Topology, [S. l.], v. 11, n. 2, p. 195–204, 2005. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/277. Acesso em: 16 dec. 2025.