%0 Journal Article %A Rémi Langevin %A Jun O'Hara %A Shigehiro Sakata %T Application of spaces of subspheres to conformal invariants of curves and canal surfaces %J Annales Polonici Mathematici %D 2013 %P 109-131 %V 108 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap108-2-1/ %R 10.4064/ap108-2-1 %G en %F 10_4064_ap108_2_1