Ekman, E. V. (1978). Some dynamic economic models of the firm: A microeconomic analysis with emphasis on firms that maximize other goals than profit alone. Economic Research Institute at the Stockholm School of Economics.

Ekman, Elon V. Some Dynamic Economic Models of the Firm: A Microeconomic Analysis with Emphasis on Firms That Maximize Other Goals than Profit Alone. Stockholm: Economic Research Institute at the Stockholm School of Economics, 1978.

Ekman, Elon V. Some Dynamic Economic Models of the Firm: A Microeconomic Analysis with Emphasis on Firms That Maximize Other Goals than Profit Alone. Economic Research Institute at the Stockholm School of Economics, 1978.