https://theconversation.com/las-leyes-de-lanchester-guerras-y-ecuaciones-222469
https://www.brookings.edu/articles/we-lost-an-opportunity-to-listen-to-you-why-macron-is-embracing-eastern-europe/
https://www.wilsoncenter.org/sites/default/files/media/uploads/documents/Venezuela%20Desk_FranciscoMonaldi_1.pdf