@misc{SchmidtSchaussSabelSchuetz2006,
  author    = {Manfred Schmidt-Schauß and David Sabel and Marko Sch{\"u}tz},
  title     = {Deciding subset relationship of co-inductively defined set constants : [Revised version, September 28, 2006]},
  booktitle = {Technical report Frank / Johann-Wolfgang-Goethe-Universit{\"a}t, Fachbereich Informatik und Mathematik, Institut f{\"u}r Informatik ; 23},
  edition   = {Revised version, September 28, 2006},
  url       = {http://www.ki.informatik.uni-frankfurt.de/papers/schauss/frank-23_v2.pdf},
  institution = {Informatik},
  series    = {Technical report Frank / Johann-Wolfgang-Goethe-Universit{\"a}t, Fachbereich Informatik und Mathematik, Institut f{\"u}r Informatik},
  number    = {23 [version 2.0]},
  type      = {workingpaper},
  pages     = {23},
  year        = {2006},
}