“Rules for Radicals - 50 years after: https://doi.org/10.53809/2021-01-TS-n.1-67-88” (2021) "Temas Sociais" Journal , (1), pp. 67–88. Available at: https://revistas.ulusofona.pt/index.php/temassociais/article/view/7768 (Accessed: 13 August 2026).