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2. AMPL® A Modeling language for Mathematical Programming;AMPL,2011
3. Agricultural research for development in the tropics: caught between energy demands and food needs;Asch;Journal of Agriculture and Rural Development in the Tropics and Subtropics,2009
4. The Blue Footprint in Milwaukee, First-ever Water Impact Index and Carbon-water-economic Analysis, Veolia Water Americas;Auguste,2010