The number of triangles covering the center of an n-set

[1]  Imre Bárány,et al.  A generalization of carathéodory's theorem , 1982, Discret. Math..

[2]  M. Baker Covering a polygon with triangles: a Caratheodory-type theorem , 1979, Journal of the Australian Mathematical Society.

[3]  J. Moon Topics on tournaments , 1968 .

[4]  H. Tverberg A Generalization of Radon's Theorem , 1966 .

[5]  B. J. Birch,et al.  On 3N points in a plane , 1959, Mathematical Proceedings of the Cambridge Philosophical Society.