OTTESEN, Iver. On the Borel cohomology of free loop spaces. Mathematica Scandinavica, Berkeley, CA, United States, v. 93, n. 2, p. 185–220, 2003. DOI: 10.7146/math.scand.a-14419. Disponível em: https://journals.msp.org/mscand/article/view/800. Acesso em: 25 jul. 2026.