International
Tables for Crystallography Volume C Mathematical, physical and chemical tables Edited by E. Prince © International Union of Crystallography 2006 
International Tables for Crystallography (2006). Vol. C, ch. 5.4, p. 539
Figure 5.4.2.2
A. Olsen^{b}


Figure 5.4.2.2
Schematic diagram of three Kikuchi lines that nearly intersect at the same point. 