@article{10_4171_ggd_635,
     author = {Shigenori Matsumoto},
     title = {Isolated circular orders of {PSL(2,}$\mathbb{Z}$)},
     journal = {Groups, geometry, and dynamics},
     pages = {1421--1448},
     year = {2021},
     volume = {15},
     number = {4},
     doi = {10.4171/ggd/635},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/635/}
}