* Singer, Hans; [http://www.southcentre.org/southletter/sl30/South%20Letter%2030trans-12.htm ''The Terms of Trade Fifty Years Later - Convergence and Divergence'']; The South Letter (30); 1998.
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</includeonly><noinclude>* {{DiarioCita diario|ARGENPRESS|Vargas Solís, Luis Paulino|El mal holandés|12 de abril de 2011|http://www.argenpress.info/2011/04/el-mal-holandes.html}}.