1. P. Graf: Path Indexing for Term Retrieval. Technical Report MPI-I-92-237, Max-Planck-Institut für Informatik, Saarbrücken, Germany, 1992.
2. X. Huang et al.: Ω-MKRP, A Proof Development Environment. In these proceedings.
3. D. Nesmith, editor: KEIM-Manual version 1.2. Universität des Saarlandes, Im Stadtwald, Saarbrücken, Germany, 1994.
4. J. Richts and D. Nesmith: Implementing Simple Theorem Provers in KEIM: Case Studies. To appear as a SEKI Report, Universität des Saarlandes, Im Stadtwald, Saarbrücken, Germany.
5. G. Steele: Common Lisp, second edition. Digital Press, Boston, 1990.