MOND, David. Deformations which preserve the non-immersive locus of a map-germ. MATHEMATICA SCANDINAVICA, [S. l.], v. 66, p. 21–32, 1990. DOI: 10.7146/math.scand.a-12289. Disponível em: https://tidsskrift.dk/math/article/view/12289. Acesso em: 13 aug. 2026.