Tham khảo Điểm đối trung

  1. ↑ Encyclopedia of Triangle Centers: This is PART 1: Introduction and Centers X(1) - X(1000), accessed 2014-11-06.
  2. ↑ Beban-Brkić, J.; Volenec, V.; Kolar-Begović, Z.; Kolar-Šuper, R. (2013), “On Gergonne point of the triangle in isotropic plane”, Rad Hrvatske Akademije Znanosti i Umjetnosti, 17: 95–106, MR 3100227.
  3. ↑ Casey, J. "Lemoine's, Tucker's, and Taylor's Circle." Supp. Ch. §3 in A Sequel to the First Six Books of the Elements of Euclid, Containing an Easy Introduction to Modern Geometry with Numerous Examples, 5th ed., rev. enl. Dublin: Hodges, Figgis, & Co., pp. 179-189, 1888.
  4. ↑ Altshiller-Court, N. College Geometry: A Second Course in Plane Geometry for Colleges and Normal Schools, 2nd ed., rev. enl. New York: Barnes and Noble, 1952
  5. ↑ Honsberger, Ross (1995), “Chapter 7: The Symmedian Point”, Episodes in Nineteenth and Twentieth Century Euclidean Geometry, Washington, D.C.: Mathematical Association of America.

Tài liệu tham khảo

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