@inproceedings{jorge2015a,
title={A geometric interpretation of the Schützenberger group of a minimal subshift},
author={Jorge Almeida, and Alfredo Costa},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203407565615822},
booktitle={Arkiv for Matematik},
pages={1-33},
year={2015},
}

Jorge Almeida, and Alfredo Costa. A geometric interpretation of the Schützenberger group of a minimal subshift. 2015. In Arkiv for Matematik. pp.1-33. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203407565615822.