References
- http://groupprops.subwiki.org/wiki/Element_structure_of_general_linear_group_of_degree_two_over_a_finite_field
- Bouchard, P., Fong, Y., Ke, W.-F., Yeh, Y.-N. (1997). Counting f such that f∘g = g∘f. Result. Math. 31:14–27.
- Foldes, S., Szigeti, J. (2016). Which self-maps appear as lattice anti-endomorphisms? Algebra Univers. 75:439–449.
- Nathanson, M. B. (2000). Elementary Methods in Number Theory. Springer.
- Newman, I. (1972). Integral Matrices. Academic Press.
- Szigeti, J. (2014). Which self-maps appear as lattice endomorphisms? Discrete Math. 321:53–56.