JOHNSEN, E. Proceedings of the First International Conference on Operational Research, The English Universities Press Ltd., 1958. 526 s., 50 sh. Ledelse og Erhvervsøkonomi, [S. l.], v. 22, 1958. Disponível em: https://tidsskrift.dk/ledelseogerhvervsoekonomi/article/view/33723. Acesso em: 20 okt. 2024.