%0 Journal Article %A Vogel, Hans-Jürgen %T On the structure of halfdiagonal-halfterminal-symmetric categories with diagonal inversions %J Discussiones Mathematicae. General Algebra and Applications %D 2001 %P 139-163 %V 21 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMGAA_2001_21_2_a1/ %G en %F DMGAA_2001_21_2_a1