%0 Journal Article %A Chervenov, Nikolay %A Iordanov, Iordan %A , Kostadinov, Boyan %T n-dimensional copulas and weak derivatives %J Serdica Mathematical Journal %D 2018 %P 413-438 %V 44 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SMJ2_2018_44_3-4_a5/ %G en %F SMJ2_2018_44_3-4_a5