Aiken, B., Strassner, J., Carpenter, B., Foster, I., Lynch, C., Mambretti, J., Moore, R., and B. Teitelbaum, "Network Policy and Services: A Report of a Workshop on Middleware", RFC 2768, DOI 10.17487/RFC2768, February 2000, <https://www.rfc-editor.org/info/rfc2768>.