@TechReport{BagnaraGHZ01TRa, Author = "R. Bagnara and R. Gori and P. M. Hill and E. Zaffanella", Title = "Finite-Tree Analysis for Constraint Logic-Based Languages", Number = 251, Type = "Quaderno", Institution = "Dipartimento di Matematica, Universit\`a di Parma, Italy", Year = 2001, Note = "Available at \url{http://www.cs.unipr.it/Publications/}", }