International agri-food trade between the EU and the less developed countries and process of economic development : the case of cotton production and trade in West and Central Africa (WCA) / Ali Ahamad Mahamat Youssouf ; supervisor Ján Pokrivčák ; consultant Artan Qineti , 2010 . 111 s . Doktorandská dizertačná práca (PhD.). - Katedra ekonomiky FEM SPU v Nitre . [1, of that borrowed 0]