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Lavoro produttivo e lavoro improduttivo
Garbero, Piero, (1980)
Kwalifikacje a wydajność i jakość pracy w przemyśle
Unolt, Jerzy, (1990)
Productive labour and effective demand : including a critique of Keynesian economics
Coontz, Sydney Henry, (1966)
On the role of distribution in different theories of cyclical growth
Glombowski, Jörg, (1983)
"Sooner or later we shall be faced once more with the problem of stagnation", Roy Forbes Harrod
Glombowski, Jörg, (1982)
La aportación de Glombowski y Krüger a la estabilidad y duración de los ciclos en un modelo de Goodwin
Outes Ruso, Xosé Luis, (1991)