Jörnsten, Kurt; Løkketangen, Arne Tabu search for weighted \(K\)-cardinality trees. (English) Zbl 0909.90265 Asia-Pac. J. Oper. Res. 14, No. 2, 9-26 (1997). MSC: 90C35 90C27 PDFBibTeX XMLCite \textit{K. Jörnsten} and \textit{A. Løkketangen}, Asia-Pac. J. Oper. Res. 14, No. 2, 9--26 (1997; Zbl 0909.90265)
Jörnsten, Kurt; Leisten, Rainer Linear programming aggregation: A heuristic for hierarchical production planning. (English) Zbl 0855.90067 Asia-Pac. J. Oper. Res. 12, No. 2, 161-177 (1995). MSC: 90B30 90C11 90C05 90C90 PDFBibTeX XMLCite \textit{K. Jörnsten} and \textit{R. Leisten}, Asia-Pac. J. Oper. Res. 12, No. 2, 161--177 (1995; Zbl 0855.90067)
Hallefjord, Åsa; Jørnsten, Kurt O.; Storøy, Sverre Traffic equilibrium paradoxes when travel demand is elastic. (English) Zbl 0805.90040 Asia-Pac. J. Oper. Res. 11, No. 1, 41-50 (1994). MSC: 90B06 PDFBibTeX XMLCite \textit{Å. Hallefjord} et al., Asia-Pac. J. Oper. Res. 11, No. 1, 41--50 (1994; Zbl 0805.90040)
Hallefjord, Åsa; Helming, Reidun; Jørnsten, Kurt O. Cooperative game theory. A note on an algorithm that has probably never been implemented. (English) Zbl 0798.90138 Asia-Pac. J. Oper. Res. 10, No. 1, 121-129 (1993). Reviewer: J.Potters (Nijmegen) MSC: 91A12 90-08 90C60 PDFBibTeX XMLCite \textit{Å. Hallefjord} et al., Asia-Pac. J. Oper. Res. 10, No. 1, 121--129 (1993; Zbl 0798.90138)
Jörnsten, Kurt O.; Värbrand, Peter Relaxation techniques and valid inequalities applied to the generalized assignment problem. (English) Zbl 0726.90063 Asia-Pac. J. Oper. Res. 7, No. 2, 172-189 (1990). MSC: 90C09 90C05 90-08 PDFBibTeX XMLCite \textit{K. O. Jörnsten} and \textit{P. Värbrand}, Asia-Pac. J. Oper. Res. 7, No. 2, 172--189 (1990; Zbl 0726.90063)