RUDRA, A. B. The Use of Directed Graphs in Evolving Overall Measures of the Structure of a System. Indian Forester, [S. l.], v. 96, n. 4, p. 283–287, 1970. DOI: 10.36808/if/1970/v96i4/26254. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/26254. Acesso em: 4 dec. 2025.