Salinas Mengual, Jorge. “The Historical Influence of Liberalism on the Nineteenth-Century Pontifical Magisterium on Religious Freedom: Continuity or Break With the Second Vatican Council?”. Vergentis. Revista De Investigación De La Cátedra Internacional Conjunta Inocencio III, vol. 1, no. 8, Apr. 2019, pp. 293-21, https://vergentis.ucam.edu/index.php/vergentis/article/view/143.