FLEGG, A. T.; ALLEN, D. O. Using Cooper’s Approach to Explore the Extent of Congestion in the New British Universities. Economic Issues, [S. l.], v. 12, n. 2, p. 47–81, 2007. Disponível em: https://mail.economicissues.org.uk/index.php/EI_OJS/article/view/141. Acesso em: 11 nov. 2026.