Tham khảo Định_lý_Đào_(conic)

  1. 1 2 3 Nguyen Ngoc Giang, A proof of Dao theorem, Global Journal of Advanced Research on Classical and Modern Geometries, ISSN: 2284-5569, Vol.4, (2015), Issue 2, page 102-105
  2. 1 2 Dao Thanh Oai, Luis Gonzalez, A Generalization Simson's line, Collings theorem tại Art of Problem Solving
  3. ↑ O.T.Dao, Advanced Plane Geometry Message 2807, ngày 17 tháng 9 năm 2015.
  4. ↑ Tran Minh Ngoc, A Purely Synthetic Proof of Dao’s Theorem On A Conic And Its Applications International Journal of Computer Discovered Mathematics, November 2018, Volume 3, pp.145-152,
  5. ↑ Nguyen Minh Ha, SYNTHETIC PROOF OF DAO’S THEOREM, Global Journal of Advanced Research on Classical and Modern Geometries, ISSN: 2284-5569, Vol.9, (2020), Issue 1, page 20-23
  6. 1 2 Geoff Smith (2015). 99.20 A projective Simson line. The Mathematical Gazette, 99, pp 339-341. doi:10.1017/mag.2015.47
  7. 1 2 O.T.Dao 29-July-2013, Two Pascals merge into one, Cut-The-Knot
  8. ↑ Dao Thanh Oai, Generalizations of some famous classical Euclidean geometry theorems International Journal of Computer Discovered Mathematics, Volume 1 (September 2016) Number 3, pp.12-20.
  9. ↑ O.T.Dao, Advanced Plane Geometry Message 1307, ngày 22 tháng 5 năm 2014
  10. ↑ O.T.Dao, Advanced Plane Geometry Message 1271, ngày 26 tháng 4 năm 2014.
  11. ↑ Tran Hoang Son, A synthetic proof of Dao's generalization of Goormaghtigh's theorem, Global Journal of Advanced Research on Classical and Modern Geometries, ISSN 2284-5569, volume 3, pages 125–129
  12. ↑ Nguyen Minh Ha and Pham Nam Khanh, Another simple proof of the Goormaghtigh theorem and the generalized Goormaghtigh theorem, Journal of Classical Geometry, Volum 4.
  13. ↑ Jean Louis AYME, LA P-TRANSVERSALE DE Q

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