1. Allman E. Sendmait--An internetwork mail router. University of California Berkeley (issued with the BSD UNIX documentation) 1983.]] Allman E. Sendmait--An internetwork mail router. University of California Berkeley (issued with the BSD UNIX documentation) 1983.]]
2. Denning P. The Internet worm. Amer. Sci. 77 2 (Mar.-Apr. 1989} 126-128.]] Denning P. The Internet worm. Amer. Sci. 77 2 (Mar.-Apr. 1989} 126-128.]]
3. Harrenstien K. Name/Finger. RFC 742 SRI Network Information Center Dec. 1977.]] Harrenstien K. Name/Finger. RFC 742 SRI Network Information Center Dec. 1977.]]