AEM: Availability Enhancing Middleware - An Approach for Enhancing the Availability of Software Applications. - Soufiane Noureddine; Axel Lehmann 001; Markus E. Lautenbacher (ARCS, 1999)

Web Call Center - Internet-Enhanced Voice Communication with Coordinated Interworking between PSTN and Internet. - Markus E. Lautenbacher (Kommunikation in Verteilten Systemen, 1999)