@TechReport{grothoff2004rgt,
  author = 	 {Christian Grothoff},
  title = 	 {Recycling Garbage Theory},
  institution =  {Purdue University},
  year = 	 {2004},
  number =       {CSD TR\# 04-012},
  note = 	 {http://grothoff.org/christian/rgt.ps},
}