BARRETT, David E. A floating body approach to Fefferman’s hypersurface measure. MATHEMATICA SCANDINAVICA, [S. l.], v. 98, n. 1, p. 69–80, 2006. DOI: 10.7146/math.scand.a-14984. Disponível em: https://tidsskrift.dk/math/article/view/14984. Acesso em: 14 aug. 2026.