* ''[[Wikipedia:Permutation City|Permutation City]]'', by [[Wikipedia:Greg Egan|Greg Egan]]
 
* ''[[Wikipedia:Permutation City|Permutation City]]'', by [[Wikipedia:Greg Egan|Greg Egan]]
 
* ''[http://www.sirlin.net/ptw-book/prologue.html Playing to Win], by [[Wikipedia:David Sirlin|David Sirlin]]
 
* ''[http://www.sirlin.net/ptw-book/prologue.html Playing to Win], by [[Wikipedia:David Sirlin|David Sirlin]]