1. Linear and nonlinear approaches for ecosystem dynamic modeling;Bledsoe,1976
2. Optimal aggregation in large scale econometric models;Chipman;Sankhya, Ser. C,1975
3. Estimation and aggregation in econometrics: An application of the theory of generalized inverses;Chipman,1976
4. The existence of aggregate production functions;Fisher;Econometrica,1969
5. Adequacy of ecosystem models;Halfon;Ecol. Modell.,1978