They were even the subject of a short (fiction) story by Greg Egan:  <a href="http:&#x2F;&#x2F;kasmana.people.cofc.edu&#x2F;MATHFICT&#x2F;mfview.php?callnumber=mf935" rel="nofollow">http:&#x2F;&#x2F;kasmana.people.cofc.edu&#x2F;MATHFICT&#x2F;mfview.php?callnumbe...</a> .