@article{JGG_2014_18_1_JGG_2014_18_1_a4,
     author = {B. Odehnal},
     title = {A {Triad} of {Circles} {Externally} {Tangent} to the {Nine-Point} {Circle} and {Internally} {Tangent} to {Two} {Sides} of a {Triangle}},
     journal = {Journal for geometry and graphics},
     pages = {61--71},
     year = {2014},
     volume = {18},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/JGG_2014_18_1_JGG_2014_18_1_a4/}
}