Tunyogi, Henri (14 Oct 2005). "Magyarországon bővít a Lufthansa Systems" [Hungary expands Lufthansa Systems]. Menedzsment Fórum (in Hungarian). Budapest, Hungary. Archived from the original on 27 October 2014. Retrieved 27 October 2014.
Tunyogi, Henri (14 Oct 2005). "Magyarországon bővít a Lufthansa Systems" [Hungary expands Lufthansa Systems]. Menedzsment Fórum (in Hungarian). Budapest, Hungary. Archived from the original on 27 October 2014. Retrieved 27 October 2014.