TY - JOUR AU - Kyung Whan Kwun TI - Some PL involutions of product 3-manifolds which preserve the center of the fundamental group JO - Colloquium Mathematicum PY - 1984 SP - 41 EP - 43 VL - 49 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-49-1-41-43/ DO - 10.4064/cm-49-1-41-43 LA - en ID - 10_4064_cm_49_1_41_43 ER -