The extended abstract of the above paper.
[ps-file] (October, 2004).
A Compositional Program Logic for Polymorphic Higher-Order Functions
Kohei Honda and Nobuko Yoshida.
6th ACM-SIGPLAN International Conference on Principles and Practice of Declarative Programming (PPDP'2004),
ACM Press, 2004.
[ps-file]
More references available from http://www.dcs.qmul.ac.uk/~kohei/logics/index.html