Johnsen E. Notes on Operations Research, 1959, udgivet af Operations Research Center, M. I. T. The Technology Press, Massachusetts Institute of Technology, Cambridge 39, Massachusetts. 1959. 256 sider. le [Internet]. 1962 Jan. 1 [cited 2025 Dec. 6];26. Available from: https://tidsskrift.dk/ledelseogerhvervsoekonomi/article/view/33992