https://web.archive.org/web/20120414175714/http://www.doomworld.com/vb/post-hell/46667-the-true-story/
https://web.archive.org/web/20170109063055/https://www.doomworld.com/vb/post-hell/87289-news-i-have-built-a-doom-source-engine-for-doom-to-run-in-mutli-core-technology/