SGEM 2016 : 3rd International multidisciplinary scientific conference on social sciences and arts SGEM 2016, 6 - 9 April, 2016, Vienna, Austria : political sciences, law, finance, economics and tourism : conference proceedings. Vol. I, book 2. Political sciences. 1. vyd. Sofia : STEF92, 2016. ISBN 978-619-7105-51-3. ISSN 2367-5659.