VALQUI HAASE, Christian Holger. Teorías homológicas y escisión. Pro Mathematica, [S. l.], v. 15, n. 29-30, p. 149–163, 2001. Disponível em: https://revistas.pucp.edu.pe/index.php/promathematica/article/view/8173. Acesso em: 28 dic. 2025.