García Bravo, MiguelRajala, TapioTakanen, Jyrki2025-02-112025-02-11202410.1007/s11118-023-10086-5https://hdl.handle.net/20.500.14352/117970We prove an estimate on the Hausdorff dimension of the set of two-sided boundary points of general Sobolev extension domains on Euclidean spaces. We also present examples showing lower bounds on possible dimension estimates of this type.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/journal articlehttps://link.springer.com/article/10.1007/s11118-023-10086-5open accessExtension domainsTwo-sided pointsSobolev spaceHausdorff dimensionAnálisis funcional y teoría de operadores1202 Análisis y Análisis Funcional