September 11, 2011 [2021-08-14]. (原始内容存档于2018-05-19). Symmetries Up To ThreeDimensions. (原始内容存档于2021-08-14). Kappraff, J. Connections: The Geometric Bridge
concept by Islam: Ragep, F. Jamil: "Astronomy", in: Krämer, Gudrun (ed.) et al.: Encyclopaedia of Islam, THREE, Brill 2010, without page numbers Direct adoption