Moss, Richard C. (19 March 2020). "Branching paths". Ars Technica. Published at 15:00. Archived from the original on 2 September 2026. Retrieved 28 September 2026.
GNU Bison is no longer distributed under the original Bison license; it has been distributed under an extension of the GNU General Public License since at least 1991.
Au, Wagner James (27 January 2000). "The best game ever". Salon. Published at 17:00. Archived from the original on 28 September 2026. Retrieved 29 September 2026.
Moss, Richard C. (19 March 2020). "Branching paths". Ars Technica. Published at 15:00. Archived from the original on 2 September 2026. Retrieved 28 September 2026.
"What is NetHack?". NetHack. Archived from the original on 28 September 2026. Retrieved 28 September 2026.
Au, Wagner James (1 August 1997). "Back to the Dungeon". Wired. Published at 12:00. Archived from the original on 25 September 2026. Retrieved 25 September 2026.
Au, Wagner James (27 January 2000). "The best game ever". Salon. Published at 17:00. Archived from the original on 28 September 2026. Retrieved 29 September 2026.
Au, Wagner James (1 August 1997). "Back to the Dungeon". Wired. Published at 12:00. Archived from the original on 25 September 2026. Retrieved 25 September 2026.