Regúnaga, Carlos (22 October 2007). "CSIS Hemisphere Focus"(PDF). The Argentine Elections: Systems and Candidates. Archived from the original(PDF) on 1 May 2015. Retrieved 22 April 2016.
Regúnaga, Carlos (22 October 2007). "CSIS Hemisphere Focus"(PDF). The Argentine Elections: Systems and Candidates. Archived from the original(PDF) on 1 May 2015. Retrieved 22 April 2016.