B. Nacif, “Keith Khrebel, Pivotal Politics: a theory of US Lawmaking, Chicago University Press, 258 p”., PyG, vol. 9, no. 1, pp. 270–273, Apr. 2002, Accessed: Oct. 13, 2026. Available: http://politicaygobierno.cide.edu/index.php/pyg/article/view/383