ALESTALO, P.; TROTSENKO, D. A. Plane sets allowing bilipschitz extensions. Mathematica Scandinavica, Berkeley, CA, United States, v. 105, n. 1, p. 134–146, 2009. DOI: 10.7146/math.scand.a-15110. Disponível em: https://journals.msp.org/mscand/article/view/587. Acesso em: 24 jul. 2026.