JANČOVIČ, Peter - SZABÓ, Jakub. Commodity Structure of Least Developed Countries’ Exports to the European Union. In Liberec Economic Forum 2021. International Conference. Liberec Economic Forum 2021 : Proceedings of the 15th International Conference, 13th-14th September 2021, (Liberec, Czech Republic, EU). - Liberec : Technical University of Liberec, 2021. ISBN 978-80-7494-578-6, pp. 277-286 online. I-21-106-00.