Communication Security in Open Health Care Networks. - Bernd Blobel; Peter Pharow; Kjeld Engel; Volker Spiegel; Rolf Krohn (MIE, 1999)

Das PASTEL-Projekt - Payment-Standards in der Telemedizin. - Volker Spiegel; Peter Pharow; Bernd Blobel (Datenschutz und Datensicherheit, 1999)

Securing interoperability between chip card based medical information systems and health networks. - Bernd Blobel; Peter Pharow; Volker Spiegel; Kjeld Engel; Rolf Engelbrecht (Int. J. Medical Informatics, 2001)