OTelosRDF: A Resource Description Format with Enhanced MetaModeling Functionalities Based on OTelos. - Wolfgang Nejdl; Hadhami Dhraief; Martin Wolpers (Semannot@K-CAP 2001, 2001)

Open Learning Repositories and Metadata Modeling. - Hadhami Dhraief; Wolfgang Nejdl; Boris Wolf; Martin Wolpers (SWWS, 2001)

Distributed Queries and Query Optimization in Schema-Based P2P-Systems. - Ingo Brunkhorst; Hadhami Dhraief; Alfons Kemper; Wolfgang Nejdl; Christian Wiesner (DBISP2P, 2003)

Processing and Optimization of Complex Queries in Schema-Based P2P-Networks. - Hadhami Dhraief; Alfons Kemper; Wolfgang Nejdl; Christian Wiesner (DBISP2P, 2004)

Semantic Caching in Schema-Based P2P-Networks. - Ingo Brunkhorst; Hadhami Dhraief (DBISP2P, 2005)

Managing metadata in open learning repositories and P2P networks. - Hadhami Dhraief (2005)