@article{SchmidtSchaussSabelMachkasova2015,
  author    = {Manfred Schmidt-Schauß and David Sabel and Elena Machkasova},
  title     = {Simulation in the call-by-need lambda-calculus with letrec, case, constructors, and seq},
  journal   = {Logical Methods in Computer Science},
  volume    = {11},
  number    = {1:7},
  pages     = {1 -- 50},
  doi       = {10.2168/LMCS-11(1:7)2015},
  year      = {2015},
}