MOND, David. Deformations which preserve the non-immersive locus of a map-germ. Mathematica Scandinavica, Berkeley, CA, United States, v. 66, p. 21–32, 1990. DOI: 10.7146/math.scand.a-12289. Disponível em: https://journals.msp.org/mscand/article/view/1336. Acesso em: 25 jul. 2026.