@misc{SchmidtSchaussSabelMachkasova2012,
  author    = {Manfred Schmidt-Schau{\"s} and David Sabel and Elena Machkasova},
  title     = {Simulation in the call-by-need lambda-calculus with letrec, case, constructors, and seq},
  institution = {Informatik},
  series    = {Technical report Frank / Johann-Wolfgang-Goethe-Universit{\"a}t, Fachbereich Informatik und Mathematik, Institut f{\"u}r Informatik},
  number    = {49},
  year      = {2012}
}