SGEM 2018. international multidisciplinary scientific conference on social sciences & arts. SGEM 2018 : 5th international multidisciplinary scientific conference on social sciences & arts, Vienna, 19-21 March 2018 : [recenzovaný zborník]. Modern science, vol. 5, no. 1.1. Political sciences, law finance, international relations. 1. vyd. Sofia : STEF92 Technology, 2018. Available on: https://doi.org/10.5593/sgemsocial2018H/11. ISBN 978-619-7408-30-0. ISSN 2367-5659.