http://alberto.fdza.googlepages.com/gcrisis1.pdf

http://www.slideshare.net/grrodriguez/gestion-y-valoracion-de-la-cartera-de-proyectos-informaticos/

http://links.jstor.org/sici?sici=0001-8392(199609)41%3A3%3C532%3ATUMBTC%3E2.0.CO%3B2-O

http://www.slideshare.net/kamichat/integrating-social-media-into-crisis-planning