User-mode Linux as a Platform for Grid Computing. An Approach to Secure Resource Sharing Using Virtual Resources. - Dominik Jürgens; Markus Krosche; Siegfried Hackel; Beatrix Harcken (Prax. Inf.verarb. Kommun., 2006)

International Standard Accident Number: A Master Case Index Linking Accident & Emergency with Medical Data. - Hoang Phi Le; Siegfried Hackel; Andreas Guenther; Raimar Goldschmidt; Melhem Daoud; Thomas M. Deserno (EFMI-STC, 2019)