1.
Johnsen E. Stanford L. Optner: Systems Analysis, for Business Management. Prentice- Hall, Englewood Cliffs, N. J., 1960. 276 s. . le [Internet]. 1963 Jan. 1 [cited 2025 Dec. 6];27. Available from: https://tidsskrift.dk/ledelseogerhvervsoekonomi/article/view/34046