%0 Journal Article %A Ulf-Rainer Fiebig %T Gyration numbers for involutions of subshifts of finite type I. %J Forum mathematicum %D 1992 %P 77-108 %V 4 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/FORUM_1992__4_6_141664/ %F FORUM_1992__4_6_141664