Scharlemann, Martin (February 1982). "The complex of curves on nonorientable surfaces". Journal of the London Mathematical Society. s2-25 (1): 171–184. doi:10.1112/jlms/s2-25.1.171.
Kojima, S. (August 1988). "Isometry transformations of hyperbolic 3-manifolds". Topology and Its Applications. 29 (3): 297–307. doi:10.1016/0166-8641(88)90027-2.