If you use these results cite them as:
B. Nikolic, I. Milosevic, T. Vukovic, N. Lazic, S. Dmitrovic, Z. Popovic and M. Damnjanovic,
Irreducible and site-symmetry-induced representations of single/double ordinary/grey layer groups,
Acta Crystallographica A78 (2022) 107–114.
where further information on the subject can be found, as well.