\bibitem{PCousot-PPDP-15}
P.~Cousot.
\newblock Verification by Abstract Interpretation, Soundness and Abstract Induction.
\newblock In \emph{Proceedings of the 17th International Symposium on Principles and 
   Practice of Declarative Programming (PPDP 2015)}, Siena, Italy, July 14-16, 2015, 
   Elvira Albert and Moreno Falaschi (Eds), \textcopy~ACM SIGPLAN, 2015.