“Plan9License”. akaros.cs.berkeley.edu. 13 February 2014時点のオリジナルよりアーカイブ。14 June 2021閲覧。 “The University of California, Berkeley, has been authorised by Alcatel-Lucent to release all Plan 9 software previously governed by the Lucent Public License, Version 1.02 under the GNU General Public License, Version 2.”
“Plan9License”. akaros.cs.berkeley.edu. 13 February 2014時点のオリジナルよりアーカイブ。14 June 2021閲覧。 “The University of California, Berkeley, has been authorised by Alcatel-Lucent to release all Plan 9 software previously governed by the Lucent Public License, Version 1.02 under the GNU General Public License, Version 2.”