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References
- ↑ Crisman, P.A., ed. (December 31, 1969). "The Compatible Time-Sharing System, A Programmer's Guide" (PDF). The M.I.T Computation Center. Retrieved March 10, 2022.
- ↑ Dr. Peter H. Salus (2005-05-05). "Groklaw - The Daemon, the GNU, and the Penguin - Ch. 7" . Retrieved 2010-12-04.
- ↑ Marshall Kirk McKusick (1999–2001). Twenty Years of Berkeley Unix : From AT&T-Owned to Freely Redistributable. From the book Open Sources: Voices from the Open Source Revolution. O'Reilly. ISBN 1-56592-582-3 . Retrieved February 10, 2022.
- ↑ Andrew Leonard (2000-05-16). "BSD Unix: Power to the people, from the code: How Berkeley hackers built the Net's most fabled free operating system on the ashes of the '60s -- and then lost the lead to Linux". salon.com. Retrieved 2014-03-24.
