@article{GDZPPN002084317, title = {Gyration numbers for involutions of subshifts of finite type I.}, journal = {Forum mathematicum}, volume = {4}, year = {1992}, pages = {77-108}, zbl = {0751.58029}, url = {http://dml.mathdoc.fr/item/GDZPPN002084317} }
Fiebig, Ulf-Rainer. Gyration numbers for involutions of subshifts of finite type I.. Forum mathematicum, Tome 4 (1992) pp. 77-108. http://gdmltest.u-ga.fr/item/GDZPPN002084317/