JOHNSEN, E. Operations Research Group, A Comprehensive Bibliography on Operations Research, 1957-58, Wiley, London, 1963. Ledelse og Erhvervsøkonomi, [S. l.], v. 28, 1964. Disponível em: https://tidsskrift.dk/ledelseogerhvervsoekonomi/article/view/34167. Acesso em: 27 sep. 2024.