Brilleslyper, M., Dorff, M. J., & McDougall, J. M. (2014). Explorations in Complex Analysis: Vol. Classroom Resource Materials. Mathematical Association of America. http://eu.alma.exlibrisgroup.com/view/action/uresolver.do?operation=resolveService&package_service_id=3039362620002418&institutionId=2418&customerId=2415
Fenchel, W. (1989). Elementary Geometry in Hyperbolic Space: Vol. De Gruyter Studies in Mathematics. De Gruyter. http://eu.alma.exlibrisgroup.com/view/action/uresolver.do?operation=resolveService&package_service_id=3039372760002418&institutionId=2418&customerId=2415
Kisil, V. V. (2012). Geometry of Mobius Transformations: Elliptic, Parabolic and Hyperbolic Actions of SL2®. World Scientific Publishing Company. http://eu.alma.exlibrisgroup.com/view/action/uresolver.do?operation=resolveService&package_service_id=3039389340002418&institutionId=2418&customerId=2415
Mumford, D., Series, C., & Wright, D. (2002). Indra’s Pearls: The Vision of Felix Klein. Cambridge University Press. http://eu.alma.exlibrisgroup.com/view/action/uresolver.do?operation=resolveService&package_service_id=3039362610002418&institutionId=2418&customerId=2415
Needham, T. (1998). Visual complex analysis. Clarendon Press.