"Review: Extremist Speech and the Paradox of Tolerance" 100 (6). abril de 1987: 1457–1481. JSTOR1341168. doi:10.2307/1341168.
Aguiar, Fernando; Parravano, Antonio (2013). "Tolerating the Intolerant: Homophily, Intolerance, and Segregation in Social Balanced Networks". doi:10.1177/0022002713498708.