KARSTOFT, H. Conformal Imbeddings of the Complex Projective Plane and Self-Dual Connections. MATHEMATICA SCANDINAVICA, [S. l.], v. 70, p. 207–226, 1992. DOI: 10.7146/math.scand.a-12398. Disponível em: https://www.mscand.dk/article/view/12398. Acesso em: 5 may. 2024.