ASTRAL: A Structred and Unified Approach to Data Base Design and Manipulation. - Tore Amble; Kjell Bratbergsengen; Oddvar Risnes (IFIP TC-2 Working Conference on Data Base Architecture, 1979)

A Neighbor Connected Processor Network for Performing Relational Algebra Operations. - Kjell Bratbergsengen; Rune Larsen 001; Oddvar Risnes; Terje Aandalen (SIGMOD Rec., 1980)

Hashing Methods and Relational Algebra Operations. - Kjell Bratbergsengen (VLDB, 1984)

Algebra Operations on a Parallel Computer - Performance Evaluation. - Kjell Bratbergsengen (IWDM, 1987)

Performance analysis of the hypercube line switch. - Kjell Bratbergsengen (C³P, 1988)

The Development of the CROSS8 and HC16-186 Parallel (Database) Computers. - Kjell Bratbergsengen; Torgrim Gjelsvik (IWDM, 1989)

Relational Algebra Operations. - Kjell Bratbergsengen (PRISMA Workshop, 1990)

Concurrency Control in Distributed Object-Oriented Database Systems. - Kjetil Nørvåg; Olav Sandstå; Kjell Bratbergsengen (ADBIS, 1997)

Improved and Optimized Partitioning Techniques in Database Query Processing. - Kjell Bratbergsengen; Kjetil Nørvåg (BNCOD, 1997)

Log-Only Temporal Object Storage. - Kjetil Nørvåg; Kjell Bratbergsengen (DEXA Workshop, 1997)

Write Optimized Object-Oriented Database Systems. - Kjetil Nørvåg; Kjell Bratbergsengen (SCCC, 1997)

An Analytical Study of Object Identifier Indexing. - Kjetil Nørvåg; Kjell Bratbergsengen (DEXA, 1998)

Optimizing OID Indexing Cost in Temporal Object-Oriented Database Systems. - Kjetil Nørvåg; Kjell Bratbergsengen (FODO, 1998)

Long-Term Temporal Data Representation of Personal Health Data. - Tore Mallaug; Kjell Bratbergsengen (ADBIS, 2005)

Integrated Electronic Health Record Access by Object Object Versioning and Metadata. - Tore Mallaug; Kjell Bratbergsengen (ADBIS Research Communications, 2006)

Cloud Computing in the 1970s: The Discovery of Hash Based Relational Algebra. - Kjell Bratbergsengen (History of Nordic Computing, 2010)