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@article{JGG_2004_8_2_JGG_2004_8_2_a9, author = {P. Yiu }, title = {Generalized {Apollonian} {Circles}}, journal = {Journal for geometry and graphics}, pages = {225--23}, publisher = {mathdoc}, volume = {8}, number = {2}, year = {2004}, url = {http://geodesic.mathdoc.fr/item/JGG_2004_8_2_JGG_2004_8_2_a9/} }
P. Yiu . Generalized Apollonian Circles. Journal for geometry and graphics, Tome 8 (2004) no. 2, pp. 225-23. http://geodesic.mathdoc.fr/item/JGG_2004_8_2_JGG_2004_8_2_a9/