en Pisanski, Tomaž; Randić, Milan (), „Bridges between geometry and graph theory”, În Gorini, Catherine A., Geometry at work, MAA Notes, 53, Washington, DC: Math. Assoc. America, pp. 174–194, MR1782654. V. în special Teorema 3, p. 176
en Pisanski, Tomaž; Randić, Milan (), „Bridges between geometry and graph theory”, În Gorini, Catherine A., Geometry at work, MAA Notes, 53, Washington, DC: Math. Assoc. America, pp. 174–194, MR1782654. V. în special Teorema 3, p. 176
en Seidel, Raimund (), „Constructing higher-dimensional convex hulls at logarithmic cost per face”, Proceedings of the Eighteenth Annual ACM Symposium on Theory of Computing (STOC '86), pp. 404–413, doi:10.1145/12130.12172.