TY - JOUR AU - Král, Josef TI - On cyclic and radial variations of a plane path (Preliminary communication) JO - Commentationes Mathematicae Universitatis Carolinae PY - 1963 SP - 3 EP - 9 VL - 4 IS - 1 UR - http://geodesic.mathdoc.fr/item/CMUC_1963_4_1_a0/ LA - en ID - CMUC_1963_4_1_a0 ER -