4Caregnani.P.On a Change in the Notion of Equilibrium in Recent work on Value and Distribution:a Camment on SamuelsonEssay (?)n Modern Capital Theory Amsterdam,1976.
5Steedman,I.Positive profits with Negative Surplus ValueThe Economic Journal,1975.
6N·Salvadori.《Switching in Methods of Prodwtion and Joint Production》《Manchester School》,1985.