2011

• Hauglid, Jon Olav; Ryeng, Norvald Hegelstad; Nørvåg, Kjetil. (2011) The DASCOSA-DB Grid Database System. Grid and Cloud Database Management.
  Academic chapter/article/Conference paper
• Ryeng, Norvald Hegelstad. (2011) Improving Query Processing Performance in Large Distributed Database Management Systems. 2011. ISBN 978-82-471-3158-9. Doktoravhandlinger ved NTNU (293).
  Doctoral dissertation
• Ryeng, Norvald Hegelstad; Hauglid, Jon Olav; Nørvåg, Kjetil. (2011) Site-Autonomous Distributed Semantic Caching. SAC'11: Proceedings of the 2011 ACM Symposium on Applied Computing.
  Academic chapter/article/Conference paper
• Ryeng, Norvald Hegelstad; Vlachou, Akrivi; Doulkeridis, Christos; Nørvåg, Kjetil. (2011) Efficient Distributed Top-k Query Processing with Caching. Lecture Notes in Computer Science (LNCS).
  Academic article

2010

• Hauglid, Jon Olav; Ryeng, Norvald Hegelstad; Nørvåg, Kjetil. (2010) DYFRAM: dynamic fragmentation and replica management in distributed database systems. Distributed and parallel databases. volum 28 (2-3).
  Academic article

2009

• Hauglid, Jon Olav; Nørvåg, Kjetil; Ryeng, Norvald Hegelstad. (2009) Efficient and Robust Database Support for Data-Intensive Applications in Dynamic Environments. Proceedings of the 25th IEEE International Conference on Data Engineering (ICDE 2009).
  Academic chapter/article/Conference paper

2008

• Ryeng, Norvald Hegelstad; Nørvåg, Kjetil. (2008) RIPPNET: Efficient Range Indexing in Peer-to-Peer Networks. Proceedings of the Third IEEE International Conference on Digital Information Management.
  Academic chapter/article/Conference paper
• Ryeng, Norvald Hegelstad; Nørvåg, Kjetil. (2008) Robust Aggregation in Peer-to-Peer Database Systems. Proceedings of IDEAS '08.
  Academic chapter/article/Conference paper