References

SOME COPLANAR POINTS IN TETRAHEDRON


[1] A. Pllana, Miscellaneous Results on Tetrahedron.

http://mathforum.org/MiscTetra2.pdf

[2] Einar Hille, Analytic Function Theory, Volume I, Second Edition, Fifth Printing, Chelsea Publishing Company, New York, 1982, ISBN 0-8284-0269-8, page 33.

[3] A. Altıntaş, Some collinearrities in heptagonal triangle, Forum Geometricorum 16 (2016).

[4] P. Yiu, Introduction to Geometry of Triangle, Florida Atlantic University, 2002.

[5] J. Sadek, M. Bani and H. N. Rhee, Isogonal conjugates in tetrahedron, Forum Geometricorum 16 (2016).

[6] Nairi M. Sedrakyan, Another look at the Volume of a Tetrahedron, Canadian Mathematical Society 27 (2001), 246-247.