[en] Harvard Business Review on Entrepreneurship Harvard Business Press
[en] David Busch's Canon EOS 90D Guide to Digital Photography Rocky Nook
[en] David Busch's Nikon Z50 Guide to Digital Photography Rocky Nook
[en] Regime Dynamics in EU's Eastern Neighbourhood Palgrave Macmillan
[en] HBR's 10 Must Reads Harvard Business Review Press
[de] Ambulantes Operieren (2007) Springer Verlag