Geodesic
Euler Straight Lines and Feierbach Points
Matematičeskoe obrazovanie, Tome 62 (2012) no. 2, pp. 24-40.

Voir la notice de l'article provenant de la source Math-Net.Ru

Properties of the three straight lines which connect the touch points of the inscribed circle of a triangle are studied. The similar lines which connect the touch points of the external inscribed circles are also considered. 
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     author = {E. D. Kulanin and N. Shihova},
     title = {Euler {Straight} {Lines} and {Feierbach} {Points}},
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E. D. Kulanin; N. Shihova. Euler Straight Lines and Feierbach Points. Matematičeskoe obrazovanie, Tome 62 (2012) no. 2, pp. 24-40. http://geodesic.mathdoc.fr/item/MO_2012_62_2_a2/