Hencl, Stanislav, och Aapo Kauranen. ”Sobolev Homeomorphisms in W1,k and the Lusin’s Condition (N) on K-Dimensional Subspaces”. Annales Fennici Mathematici 42, no. 2 (augusti 1, 2017): 771–797. åtkomstdatum maj 20, 2024. https://afm.journal.fi/article/view/135692.