Fordham, Blake (2003), "Minimal Length Elements of Thompson's Group F", Geometriae Dedicata, 99 (1), Springer Science and Business Media LLC: 179–220, doi:10.1023/a:1024971818319, ISSN0046-5755
Fordham, Blake (2003), "Minimal Length Elements of Thompson's Group F", Geometriae Dedicata, 99 (1), Springer Science and Business Media LLC: 179–220, doi:10.1023/a:1024971818319, ISSN0046-5755