Chú thích Định_lý_Euler_(hình_học)

  1. ↑ Johnson, Roger A. (2007) [1929], Advanced Euclidean Geometry, Dover Publ., tr. 186.
  2. 1 2 Alsina, Claudi; Nelsen, Roger (2009), When Less is More: Visualizing Basic Inequalities, Dolciani Mathematical Expositions, 36, Mathematical Association of America, tr. 56, ISBN 9780883853429.
  3. 1 2 Debnath, Lokenath (2010), The Legacy of Leonhard Euler: A Tricentennial Tribute, World Scientific, tr. 124, ISBN 9781848165250.
  4. ↑ Dunham, William (2007), The Genius of Euler: Reflections on his Life and Work, Spectrum Series, 2, Mathematical Association of America, tr. 300, ISBN 9780883855584.
  5. ↑ Euler, Leonhard (1767), “Solutio facilis problematum quorumdam geometricorum difficillimorum” (PDF), Novi Commentarii academiae scientiarum Petropolitanae (bằng tiếng Latin), 11: 103–123Quản lý CS1: ngôn ngữ không rõ (liên kết).
  6. ↑ Chapple, William (1746), “An essay on the properties of triangles inscribed in and circumscribed about two given circles”, Miscellanea Curiosa Mathematica, 4: 117–124. The formula for the distance is near the bottom of p.123.
  7. 1 2 Svrtan, Dragutin; Veljan, Darko (2012), “Non-Euclidean versions of some classical triangle inequalities”, Forum Geometricorum, 12: 197–209.