Pareja-Ramos, J. J., S. Bazán-Ruiz, and C. Maguiña-Vargas. “Plague in Peru. Threat of Urban Epidemic Outbreak in La Libertad”. ACTA MEDICA PERUANA, Vol. 30, no. 4, Dec. 2013, pp. 150-1, http://54.39.98.165/index.php/AMP/article/view/1354.