@misc{SabelSchmidtSchauss2006,
  author    = {David Sabel and Manfred Schmidt-Schauß},
  title     = {A call-by-need lambda-calculus with locally bottom-avoiding choice: context lemma and correctness of transformations},
  booktitle = {Technical report Frank / Johann-Wolfgang-Goethe-Universit{\"a}t, Fachbereich Informatik und Mathematik, Institut f{\"u}r Informatik ; 24},
  number    = {Version: 13 Januar 2006},
  url       = {http://www.ki.informatik.uni-frankfurt.de/papers/sabel/frank-24-ambcalc.pdf},
  institution = {Informatik},
  series    = {Technical report Frank / Johann-Wolfgang-Goethe-Universit{\"a}t, Fachbereich Informatik und Mathematik, Institut f{\"u}r Informatik},
  number    = {24},
  type      = {workingpaper},
  pages     = {67},
  year        = {2006},
}