Geodesic
Euler Straight Lines and Feierbach Points
Matematičeskoe obrazovanie, no. 2 (2012), pp. 24-40 Cet article a éte moissonné depuis la source Math-Net.Ru

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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. 
@article{MO_2012_2_a2,
     author = {E. D. Kulanin and N. Shihova},
     title = {Euler {Straight} {Lines} and {Feierbach} {Points}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {24--40},
     year = {2012},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2012_2_a2/}
}
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E. D. Kulanin; N. Shihova. Euler Straight Lines and Feierbach Points. Matematičeskoe obrazovanie, no. 2 (2012), pp. 24-40. http://geodesic.mathdoc.fr/item/MO_2012_2_a2/