The 4 linked references in paper Z. Usman A., O. Kehinde (2017) “COCOA PRODUCTION AND QUALITY IN NIGERIA: AN ANALYSIS OF PRE AND POST-LIBERALIZATION EFFECT” / spz:neicon:stavapk:353

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  2. Gilbert C. L. and Tollens E. F. Does Market Liberalisation Jeopardise Export Quality? Cameroonian Cocoa, 1988–2000 // Journal of African Economies. 2003. No 12. P. 303342.
  3. International Cocoa Organization (ICCO) // Quarterly Bulletin. 2007. URL: http://www. icco.org/about-us/icco-news/251-february2014-quarterly-bulletin-of-cocoa-statistics. html (dowmloaded time: 13.06.2015).
  4. International Cocoa Organization (ICCO) // Quarterly Bulletin. 2014. URL: http://www. icco.org/about-us/icco-news/251-february2014-quarterly-bulletin-of-cocoa-statistics. html (dowmloaded time: 13.06.2015).