International
Tables for Crystallography Volume B Reciprocal space Edited by U. Shmueli © International Union of Crystallography 2006 
International Tables for Crystallography (2006). Vol. B, ch. 1.1, p. 6
Figure 1.1.4.1 ^{a}School of Chemistry, Tel Aviv University, 69 978 Tel Aviv, Israel 

Figure 1.1.4.1
Derivation of the general expression for the rotation operator. The figure illustrates schematically the decompositions and other simple geometrical considerations required for the derivation outlined in equations (1.1.4.22) –(1.1.4.28). 