M. Leonard and . Blumenthal, Theory and applications of distance geometry, 1970.

H. Busemann, The geometry of geodesics, 1955.

X. Chen, The Sylvester-Chvatal Theorem, Discrete & Computational Geometry, vol.35, issue.2, pp.193-199, 2006.
DOI : 10.1007/s00454-005-1216-9

X. Chen and V. Chvátal, Problems related to a de Bruijn???Erd??s theorem, Discrete Applied Mathematics, vol.156, issue.11, pp.2101-2108, 2008.
DOI : 10.1016/j.dam.2007.05.036

V. Chvátal, Sylvester?Gallai Theorem and Metric Betweenness, Discrete and Computational Geometry, vol.31, issue.2, pp.175-195, 2004.
DOI : 10.1007/s00454-003-0795-6

H. S. Coxeter, Introduction to geometry, 1961.

N. G. De-bruijn and P. Erd?-os, On a combinatorial problem, = Indagationes Math, pp.1277-1279, 1948.

N. G. De-bruijn and P. Erd?-os, A Colour Problem for Infinite Graphs and a Problem in the Theory of Relations, Proc. Ser. A. 54 = Indagationes Math, pp.369-373, 1951.
DOI : 10.1016/S1385-7258(51)50053-7

K. Menger, . Untersuchungenüberuntersuchungen¨untersuchungenüber, and . Metrik, Untersuchungen ???ber allgemeine Metrik, Mathematische Annalen, vol.100, issue.1, pp.75-163, 1928.
DOI : 10.1007/BF01448840

P. Turán, On the theory of graphs, Colloquium Math, vol.3, pp.19-30, 1954.

P. Turán, Eine Extremalaufgabe aus der Graphentheorie, pp.436-452, 1941.