BEGHIN, John C. a BELADI, Hamid. Nontariff measures with market imperfections: trade and welfare implications. Frontiers of economics and globalization. Bingley, U.K.: Emerald, 2013. ISBN 9781781907559. Dostupné také z: https://proxy.k.utb.cz/login?url=http://www.emeraldinsight.com/1574-8715/12.