APERGIS, Nicholas - AJMI, Ahdi Noomen. Systemic sovereign risk and asset prices: evidence from the CDS market, stressed european economies and nonlinear causality tests. In Finance a úvěr : Czech journal of economics and finance. - Praha : UK Praha, Fakulta sociálních věd, 2015. ISSN 0015-1920, 2015, roč. 65, č. 2, s. 127-143.