^Dana S. Scott. "A type-theoretical alternative to ISWIM, CUCH, OWHY". Theoretical Computer Science, 121:411–440, 1993. Annotated version of the 1969 manuscript.
^Plotkin, Gordon D. (1977). "LCF considered as a programming language" (PDF). Theoretical Computer Science. 5 (3): 223–255. doi:10.1016/0304-3975(77)90044-5.