CAVANA, Robert; CLIFFORD, Leslie. The Matrix, the Spiderweb and the influence diagram: Developments in systems thinking at the New Zealand customs service. School of Management Working Papers, [S. l.], p. 1–26, 1999. Disponível em: https://ojs.victoria.ac.nz/somwp/article/view/7246. Acesso em: 25 oct. 2025.