Integrated Trouble Management to Support Service Quality Assurance in a Multi-provider Context. - Dan Dragan; Thomas Gringel; Jane Hall; Richard O. Sinnott; Michael Tschichholz; Wilhelm Vortisch (IS&N, 2000)

Supporting Service Quality Assurance via Trouble Management. - Richard O. Sinnott; Thomas Gringel; Michael Tschichholz; Wilhelm Vortisch (MMNS, 2000)

Trouble Management for Multimedia Services in Multi-Provider Environments. - Nazim Agoulmine; Dan Dragan; Thomas Gringel; Jane Hall; Evgenia Rosa; Michael Tschichholz (J. Netw. Syst. Manag., 2000)

Federated Accounting: Design of Mediation Adapter for Accounting in a Business-to-Business Environment. - Thomas Gringel; Bharat Bhushan; Eric Leray; Willie Donnelly (LANOMS, 2001)

Federated Accounting Management System Architecture for Multimedia Service Usage Management. - Bharat Bhushan; Thomas Gringel; C. Ryan; Eric Leray; Eamonn de Leastar; J. Cloney (MMNS, 2002)