Sourcing, Risk and the Financial Market. - Tom Gellrich; Heiko Gewald (ECIS, 2005)

The Impact of Perceived Risk on the Capital Market's Reaction on Outsourcing Announcements. - Heiko Gewald; Tom Gellrich (PACIS, 2005)

Vertical Integration and Bank Performance. - Tom Gellrich; Andreas Hackethal; Markus Holzhäuser (Wirtschaftsinformatik, 2005)

The impact of perceived risk on the capital market's reaction to outsourcing announcements. - Heiko Gewald; Tom Gellrich (Inf. Technol. Manag., 2007)