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Eco-efficiency analysis of power plants: An extension of data envelopment analysis,
Korhonen, Pekka J., (2004)
Economic consequences of a change in demographic patterns: a linear programming model
Luptacik, Mikulas, (1977)
Eco-efficiency and eco-productivity change over time in a multisectoral economic system
Mahlberg, Bernhard, (2014)