Mirian Andrés Laureano Lambán Julio Rubio Executing in Common Lisp, Proving in ACL2. 1-12 2007 conf/mkm/2007 Calculemus/MKM http://dx.doi.org/10.1007/978-3-540-73086-6_1 db/conf/mkm/mkm2007.html#AndresLR07