TY - JOUR AU - A. Lelek TI - Some problems concerning curves JO - Colloquium Mathematicum PY - 1971 SP - 93 EP - 98 VL - 23 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-23-1-93-98/ DO - 10.4064/cm-23-1-93-98 LA - en ID - 10_4064_cm_23_1_93_98 ER -