John N. Crossley Iman Poernomo Fred: An Approach to Generating Real, Correct, Reusable Programs from Proofs. 71-88 2001 7 J. Univers. Comput. Sci. 1 https://doi.org/10.3217/jucs-007-01-0071 db/journals/jucs/jucs7.html#CrossleyP01