Brad R. Ewing, Troy R. Hawkins, Thomas O. Wiedmann, Alessandro Galli, A. Ertug Ercin, Jan Weinzettel, Kjartan Steen-Olsen,
Integrating ecological and water footprint accounting in a multi-regional input–output framework Ecological Indicators. ,vol. 23, pp. 1- 8 ,(2012) ,
10.1016/J.ECOLIND.2012.02.025