BARTH, W.; LARSEN, M. E. On the Homotopy Groups of Complex Projective Algebraic Manifolds. MATHEMATICA SCANDINAVICA, [S. l.], v. 30, p. 88–94, 1972. DOI: 10.7146/math.scand.a-11066. Disponível em: https://www.mscand.dk/article/view/11066. Acesso em: 30 apr. 2024.