DALE, Magnar. Embedding-obstruction for products of non-singular, projective varieties. MATHEMATICA SCANDINAVICA, [S. l.], v. 44, p. 278–288, 1979. DOI: 10.7146/math.scand.a-11810. Disponível em: https://tidsskrift.dk/math/article/view/11810. Acesso em: 13 aug. 2026.