3
by Varangis, Panayotis N.
Published 1995
World Bank, International Economics Dept., Commodity Policy and Analysis Unit

4
by Fink, Carsten
Published 1999
Energy Mining and Telecommunications Dept

5
by Hoekman, Bernard M.
Published 2009
Palgrave Macmillan

7
by Hoekman, Bernard M.
Published 1997
World Bank, International Economics Dept., International Trade Division