Schmidt, Mario (2008). "The Sankey Diagram in Energy and Material Flow Management - Part II: Methodology and Current Applications". Journal of Industrial Ecology. 12 (2): 173–185. doi:10.1111/j.1530-9290.2008.00015.x. ISSN1530-9290.
Schmidt, Mario (2008). "The Sankey Diagram in Energy and Material Flow Management - Part II: Methodology and Current Applications". Journal of Industrial Ecology. 12 (2): 173–185. doi:10.1111/j.1530-9290.2008.00015.x. ISSN1530-9290.