TY - JOUR AU - D. Pavlica AU - L. Zajícek TI - On the Directions of Segments and r-Dimensional Balls on a Convex Surface JO - Journal of convex analysis PY - 2007 SP - 149 EP - 167 VL - 14 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JCA_2007_14_1_JCA_2007_14_1_a11/ ID - JCA_2007_14_1_JCA_2007_14_1_a11 ER -