%0 Journal Article %T Perlman and WellnerĄ¯s Circular and Transformed Circular Copulas are Particular Beta and t Copulas %A M. C. Jones %J Symmetry %D 2013 %I MDPI AG %R 10.3390/sym5010081 %X All but one of the copulas in a recent paper in Symmetry by Perlman and Wellner can be identified as particular members of either the beta or t families of elliptical copulas. %K beta distribution %K bivariate distribution %K circular copula %K elliptical copula %K multivariate distribution %K t distribution %U http://www.mdpi.com/2073-8994/5/1/81