Agarwal, P., Edelsbrunner, H., &; Wang, Y. (2002). Computing the writhing number of a polygonal knot. In Proceedings of the 13th annual ACM-SIAM symposium on Discrete algorithms (pp. 791–799). San Francisco, CA, USA: SIAM.
LibreCat: https://research-explorer.ista.ac.at/record/4003