1. Standard ML of New Jersey;AT & T Bell Laboratories,1993
2. Modified basic functionality in combinatory logic;Curry;Dialectica,1969
3. Principal type-schemes for functional programs;Damas,1982
4. Extending the type checker of SML by polymorphic recursion — a correctness proof;Emms,1996
5. M. Emms, H. Leiβ, SML+ www.cis.uni-muenchen.de/people/leiss/ polyrec.html ftp.cis.uni-muenchen. de/pub/leiss/polyrec.tar.gz.