Bridging the Gap between Privacy and Security in Multi-Domain Federations with Identity Tokens. - David J. Lutz; Ruth del Campo (MobiQuitous, 2006)

Cash Tokens for SAML Based Federations. - David J. Lutz (FinanceCom, 2007)

Federation Payments using SAML Tokens with Trusted Platform Modules. - David J. Lutz (ISCC, 2007)

Token-Based Payment in Dynamic SAML-Based Federations. - David J. Lutz; Burkhard Stiller (AIMS, 2008)

Harmonizing service and network provisioning for federative access in a mobile environment. - David J. Lutz; Patrick Mandic; Sascha Neinert; Ruth del Campo; Jürgen Jähnert (NOMS, 2008)

A Framework for Dynamic and Reliable E-Procurement. - David J. Lutz; Yongzheng Liang; Sascha Neinert (ICEBE, 2010)

Charging of SAML-based federated VoIP services. - David J. Lutz; Dominik Lamp; Patrick Mandic; Fabio Victora Hecht; Burkhard Stiller (ICITST, 2010)

Combining identity federation with Payment: The SAML-based Payment Protocol. - David J. Lutz; Burkhard Stiller (NOMS, 2010)

Bridging between SAML-Based Payment and Other Identity Federation Payment Systems. - David J. Lutz (DEIS, 2011)

Payment processes for identity federations: the SAML-based payment approach. - David J. Lutz (Shaker, 2011)

A Survey of Payment Approaches for Identity Federations in Focus of the SAML Technology. - David J. Lutz; Burkhard Stiller (IEEE Commun. Surv. Tutorials, 2013)