%0 Journal Article %A Kenny, Robert %T Estimates of Hausdorff Dimension for the Non-Wandering Set of an Open Planar Billiard %J Canadian journal of mathematics %D 2004 %P 115-133 %V 56 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2004-006-8/ %R 10.4153/CJM-2004-006-8 %F 10_4153_CJM_2004_006_8