International
Tables for
Crystallography
Volume A
Space-group symmetry
Edited by Th. Hahn

International Tables for Crystallography (2006). Vol. A, ch. 9.3, p. 759

Figure 9.3.6.1 

B. Grubera

aDepartment of Applied Mathematics, Faculty of Mathematics and Physics, Charles University, Malostranské nám. 25, CZ-11800 Prague 1, Czech Republic

[Figure 9.3.6.1]
Figure 9.3.6.1

Three possible decompositions of a two-dimensional lattice L into sublattices of index 2.