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3. Blackhurst, R., N. Marian and J. Tumlir (1977) Trade Liberalization, Protectionism, and Interdependence. GATT Studies in International Trade, no. 5, Geneva.
4. Blackhurst, R., N. Marian and J. Tumlir (1978) Adjustment, Trade and Growth in Developed and Developing Countries. GATT Studies in International Trade, no. 6, Geneva.
5. Blackhurst, R., J. Tumlir (1980) Trade Relations under Flexible Exchange Rates. GATT Studies in International Trade, no. 8, Geneva.