幾何中心
↑ Clark Kimberling, "Trilinear distance inequalities for the symmedian point, the centroid, and other triangle centers", Forum Geometricorum, 10 (2010), 135--139. http://forumgeom.fau.edu/FG2010volume10/FG201015index.html
↑ Clark Kimberling's Encyclopedia of Triangles “Archived copy”. 2012年4月19日時点のオリジナルよりアーカイブ。2012年6月2日閲覧。
↑ Bourke & July 1997.
↑ Leung, Kam-tim; and Suen, Suk-nam; "Vectors, matrices and geometry", Hong Kong University Press, 1994, pp. 53–54