Vote-Buying and Front Men (页面存档备份,存于互联网档案馆) Pachico, Elyssa, Colombian party accused of ‘parapolitics’, Colombia Reports, 2010-03-08 [2020-06-12], (原始内容存档于2010-11-22)
Presidents: Paths to the Colombian Presidency, Pathways to Power (Pennsylvania State University Press), 2008: 291 Roldán, Mary, End of Discussion: Violence