%0 Journal Article %A Le Roux, Frédéric %T Free planar actions of the Klein bottle group %J Geometry & topology %D 2011 %P 1545-1567 %V 15 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.2140/gt.2011.15.1545/ %R 10.2140/gt.2011.15.1545 %F GT_2011_15_3_a6