%0 Journal Article %A Kyung Whan Kwun %T Some PL involutions of product 3-manifolds which preserve the center of the fundamental group %J Colloquium Mathematicum %D 1984 %P 41-43 %V 49 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-49-1-41-43/ %R 10.4064/cm-49-1-41-43 %G en %F 10_4064_cm_49_1_41_43