The gravity model of international trade: the case of cotton initiative (WCA) countries [elektronický zdroj] / Ali Ahamad Mahamat Youssouf...[et al.] .
In: ICABR 2013 / ICABR [Online (635 s.)]. -- Brno : Mendel University in Brno, 2013. -- ISBN 978-0-620-55419-0. -- S. 597-616, online
Kategória EPCA do 2021: AFC
http://www.icabr.com/fullpapers/icabr2013.pdf .