1. Recursive Programming Techniques;Burge,1975
2. Edinburgh LCF;Gordon,1977
3. A metalanguage for interactive proof in LCF;Gordon,1978
4. Some ideas on data type in high-level languages;Gries;Comm. ACM.,1977
5. The principal type-scheme of an object in combinatory logic;Hindley;Trans. Amer. Math. Soc.,1969