Smid, Michiel Algorithms and Complexity, MPI for Informatics, Max Planck Society;
https://cccg.ca/proceedings/1995/Paper33.pdf (beliebiger Volltext)
Janardan, R., & Smid, M. (1995). On the Width and Roundness of a Set of Points in the Plane. In Proceedings of the 7th Canadian Conference on Computational Geometry (pp. 193-198). -: -.