PARHIZGAR, M. On the cohomology ring of the free loop space of a wedge of spheres. MATHEMATICA SCANDINAVICA, [S. l.], v. 80, p. 195–248, 1997. DOI: 10.7146/math.scand.a-12619. Disponível em: https://www.mscand.dk/article/view/12619. Acesso em: 28 apr. 2024.