Interactive Concept Mapping in ActiveMath. - Erica Melis; Philipp Kärger; Martin Homik (DeLFI, 2005)

Integrating Learning Object Repositories Using a Mediator Architecture. - Philipp Kärger; Carsten Ullrich; Erica Melis (EC-TEL, 2006)

Querying Heterogeneous and Distributed Learning Object Repositories via Ontology-Based Mediation. - Philipp Kärger; Erica Melis; Carsten Ullrich (ICALT, 2006)

Exploiting Preference Queries for Searching Learning Resources. - Fabian Abel; Eelco Herder; Philipp Kärger; Daniel Olmedilla; Wolf Siberski (EC-TEL, 2007)

Exploiting Policies in an Open Infrastructure for Lifelong Learning. - Juri Luca De Coi; Philipp Kärger; Arne Wolf Koesling; Daniel Olmedilla (EC-TEL, 2007)

Services for Knowledge Resource Sharing & Management in an Open Source Infrastructure for Lifelong Competence Development. - Elena Demidova; Philipp Kärger; Daniel Olmedilla; Stefaan Ternier; Erik Duval; Michele Dicerto; Carlos Mendez; Krassen Stefanov (ICALT, 2007)

Hybrid Personalization For Recommendations. - Eelco Herder; Philipp Kärger (LWA, 2008)

Exploiting Preferences for Minimal Credential Disclosure in Policy-Driven Trust Negotiations. - Philipp Kärger; Daniel Olmedilla; Wolf-Tilo Balke (Secure Data Management, 2008)

Towards Reactive Semantic Web Policies: Advanced Agent Control for the Semantic Web. - José Júlio Alferes; Ricardo Amador; Philipp Kärger; Daniel Olmedilla (ISWC (Posters & Demos), 2008)

Control Your eLearning Environment: Exploiting Policies in an Open Infrastructure for Lifelong Learning. - Juri Luca De Coi; Philipp Kärger; Arne Wolf Koesling; Daniel Olmedilla (IEEE Trans. Learn. Technol., 2008)

What Do You Prefer? Using Preferences to Enhance Learning Technology. - Philipp Kärger; Daniel Olmedilla; Fabian Abel; Eelco Herder; Wolf Siberski (IEEE Trans. Learn. Technol., 2008)

Using Natural Language Policies for Privacy Control in Social Platforms. - Juri Luca De Coi; Philipp Kärger; Daniel Olmedilla; Sergej Zerr (SPOT@ESWC, 2009)

Trust and Privacy on the Social and Semantic Web (SPOT 2009). - Michael Hausenblas; Philipp Kärger; Daniel Olmedilla; Alexandre Passant; Axel Polleres (SPOT@ESWC, 2009)

Reactive Policies for the Semantic Web. - Piero A. Bonatti; Philipp Kärger; Daniel Olmedilla (ESWC (1), 2010)

Guarding a Walled Garden - Semantic Privacy Preferences for the Social Web. - Philipp Kärger; Wolf Siberski (ESWC (2), 2010)

The missing links: discovering hidden same-as links among a billion of triples. - George Papadakis 001; Gianluca Demartini; Peter Fankhauser; Philipp Kärger (iiWAS, 2010)

Policy representation and reasoning with preferences and reactivity. - Philipp Kärger (2010)