1. Almon, C. (1984) Building Models for Economic Forecasting. Text Material for Economics 402. University of Maryland, USA.
2. Barnabani, M. (1983) Un’analisi del commercio con l’estero italiano disaggregato per branca produttiva. Tesi di laurea. Facolta’ di Economia e commercio. Universita’ di Firenze, Italy.
3. Grassini, M. (1982) A National Scenario for a Regional Model. WP-82–131 . IIASA, Laxenburg, Austria.
4. Grassini, M. (1983) Structural Changes in Italian Foreign Trade. In A. Smyshlyaev (Ed. ) ,Proceedings of the Fourth IIASA Task Force Meeting on Input-ouput Modeling, CP-83-S5, IIASA, Laxenburg, Austria.
5. Nyhus, D.E. (1975) The Trade Model of a Dynamic World Input-output Forecasting System. INFORUN Research Report no. 14. Department of Economics, University of Maryland, College Park, Maryland.