Strzelecki, Pawel, Marta Szumanska, and Heiko von der Mosel. “A Geometric Curvature Double Integral of Menger Type for Space Curves”. Annales Fennici Mathematici 34, no. 1 (February 1, 2009): 195–214. Accessed November 25, 2024. https://afm.journal.fi/article/view/135261.