1. D. Bobrow, L. DeMichiel, R. Gabriel, S. Keene, G. Kiczales and D. Moon, Common Lisp Object System Specification, SIGPLAN notices 23 (special issue), 1988
2. D. Bobrow, R. Gabriel and J. White, CLOS in Context. In Object-Oriented Programming, the Clos Perspective, The MIT Press, chap. 2, pp. 29–61, 1995
3. P. Cointe, Metaclasses are First Class: the ObjVLisp Model. Proc. of OOPSLA’89, SIGPLAN notices 24(10), pp. 156–167, 1989.
4. S. Demphlous, A Metaobject Protocol for Interoperability, Proc. of the ISCA Int. Conf. on Parallel and Distributed Computing Systems, pp. 653–657, 1996.
5. S. Demphlous, Databases Evolution: An Approach by Metaobjects, Proc. the third Int. Workshop on Databases and Information Systems, ACM SIGMOD Chapter, pp. 31–37, 1996.