@article{JGG_2013_17_1_JGG_2013_17_1_a3,
     author = {H. Okumura },
     title = {Archimedean {Circles} of the {Collinear} {Arbelos} and the {Skewed} {Arbelos}},
     journal = {Journal for geometry and graphics},
     pages = {31--52},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {2013},
     url = {http://geodesic.mathdoc.fr/item/JGG_2013_17_1_JGG_2013_17_1_a3/}
}