Ciupka, S. and Sanetra-Półgrabi, S. (2020) “Contemporary threats to state security - an overview of the issues”, Scientific Journal of Bielsko-Biala School of Finance and Law. Bielsko-Biała, PL, 24(4), pp. 9–13. doi: 10.19192/wsfip.sj4.2020.2.