“…For these reasons, bivariate copula functions have constituted an object of interest for many researchers (see [Boero, Silvapulle, Tursunalieva 2009;Dias, Embrechts 2007;Embrechts, Hofert 2013;Trivedi, Zimmer 2006;Genest, Favre 2007;Patton 2006]). Also Polish researchers have contributed to the study of copula functions with applications in insurances (see [Wanat 2011]), stock market analysis (see [Doman, Doman 2010;Pipień 2013]), risk analysis (see [Jajuga, Papla 2005]). However, it seems that copula functions of higher dimensions are still under investigation (see [Dias, Embrechts 2010;Bugienė, Šutienė 2011;Venter et al 2007]).…”