2016 The Authors. Published by Elsevier Inc. on behalf of International Energy Initiative. This is an open access
article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Excepto si se señala otra cosa, la licencia del ítem se describe como 2016 The Authors. Published by Elsevier Inc. on behalf of International Energy Initiative. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).