%0 Journal Article %A Maciej Wojtkowski %T Geodesics on open surfaces containing horns %J Studia Mathematica %D 1982 %P 115-151 %V 73 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-73-2-115-151/ %R 10.4064/sm-73-2-115-151 %G en %F 10_4064_sm_73_2_115_151