OOSTEN, J. van. Topological Aspects of Traces. BRICS Report Series, [S. l.], v. 2, n. 57, 1995. DOI: 10.7146/brics.v2i57.19958. Disponível em: https://tidsskrift.dk/brics/article/view/19958. Acesso em: 28 mar. 2024.