TY - JOUR Y1 - 2015/// ID - publicatio15938 EP - 73 TI - Isoptic characterization of spheres IS - 1 SP - 63 A1 - Kurusa Árpád A1 - Ódor Tibor AV - restricted VL - 106 JF - JOURNAL OF GEOMETRY SN - 0047-2468 UR - http://publicatio.bibl.u-szeged.hu/15938/ ER -