1. Consideramos oportuno incluir las referencias bibliogr�ficas indicadas por Zamberlan referidas al modelo en menci�n: �The author develops and takes up this outline on several occasions;Cf. Georgescu-Roegen,1966
2. also proposes a simplified version that takes also into consideration the entropic vision of the economic process.� Las referencias indicadas son;; G-R Georgescu-Roegen;Analytical economics, issues and problems,1966
3. The entropy law and the economic process;G-R;Southern Economic Journal,1971