copstRuc is an implementation of the copula structure analysis techniques presented in

• Klüppelberg, C., Kuhn, G: Copula structure analysis. J. Royal Stat. Soc., Series B 71 (3), 2009, 737 - 753.
• Haug, S., Klüppelberg, C., and Kuhn, G.: Copula structure analysis based on extreme dependence. Statistics and Its Interface 8 (1), 2015, 93-107