TY - JOUR AU - R. Koch AU - L. McAuley TI - Semigroups on continua ruled by arcs JO - Fundamenta Mathematicae PY - 1964 SP - 1 EP - 8 VL - 56 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-56-1-1-8/ DO - 10.4064/fm-56-1-1-8 LA - en ID - 10_4064_fm_56_1_1_8 ER -