**Efficient Matrix Multiplication on SIMD Computers**. In SIAM J. on Matrix Analysis and Applications, Vol 13, No. 1, pp. 386-401, 1992. joint work with P. E. Bjorstad, F. Manne and M. Vajtersic**Two Different Data-Parallel Implementations of the BLAS.**In J. S. Kowalik and L. Grandinetti: "Software for Parallel Computation", Springer 1992. Joint work with P. Bjorstad.**Data-Parallel BLAS as a basis for LAPACK on Massively Parallel Computers.**In M. S. Moonen et al. (eds). Linear Algebra for Large Scale and Real-Time Applications, pp 13-20, 1992. Joint work with P. Bjorstad.

**A Parallel Implementation of the Hungarian Algorithm. .**In proceedings of NIK'92, Tapir 1992. Joint work with Sverre Storoy**Average Case Complexity Analysis of Algorithms for the Linear Assignment Problem.**In Proceedings of NOAS '93, Trondheim 1993.**A Data Parallel Augmenting Path Algorithm for the Dense Linear Many-To-One Assignment Problem.**Comp. Optimization and Appl. Volume 6, Number 3, 1996. Joint work with Olof Damberg and Sverre Storoy**Massively Parallel Augmenting Path Algorithms for the Assignment Problem**Computing. Vol. 59, No. 1, 1997. pp. 1-16. Joint work with Sverre Storoy**A Generic Parallel Branch and Bound Environment on a Network of Workstations**In proceedings of Hiper-99., pp 474-483, Joint work with Roman Batoukov.

**Optimal partitioning of sequences**. In Journal of Algorithms, Vol 19, No. 2, Sept. 1995, pp. 235-249. Joint work with Fredrik Manne.**Structured Partitioning of Arrays**In "Applied Parallel Computing", 1996, Ed. J. Wasniewski, et.al pp. 467-477, Joint work with Fredrik Manne

**Parallelization of a Local Area Ocean Model**In "Applied Parallel Computing", 1996, Ed. J. Wasniewski, et.al pp. 543-554, Joint work with Luka Onesti**A programmers view of Parallel Computers**In "Parallel Computing in Optimization", Kluwer 1997, Ed: A. Migdalas, P. M. Pardalos and S. Storøy.**F90 og HPF for the Origin 2000 ?**In proceedings from The European Cray MPP-meeting, Paris, sept. 1997. co-authored with Arild Dyrseth**Early Experiences with OpenMP on the Origin 2000**In proceedings from The European Cray MPP-meeting, Munich, sept. 1998. co-authored with Ragnhild Blikberg.**Tools for Development of Programs for a Cluster of Shared Memory Multiprocessors**The Journal of Supercomputing 17(3), pp 311-322, Nov. 2000 Joint work with B. Chapman, J. Merlin, D. Pritchard, F. Bodin, Y. Mevel and L. Hill

**GRISK: An internet based search for K-optimal Lattice rules**In proceedings from PARA2000., LNCS 1947, Springer Verlag, 2001. Joint work with Jan Frode Myklebust**Parallel Wavelet-based Compression of Two-Dimensional Data**In proceedings of Algorithmy 2000. Joint work with Maria Lucka**Nested Parallelism: Allocation of processor to tasks and OpenMP implementation**Scientific programming, Vol. 9, No 2-3, 2001, pp 185-194. Joint work with Ragnhild Blikberg