@Article{Matthes-Joachimski-AML,
  author =       {Felix Joachimski and Ralph Matthes},
  title =        {Short Proofs of Normalization for the simply-typed
                  $\lambda$-calculus, permutative conversions and
                  {G}{\"o}del's {T}},
  journal =      {Archive for Mathematical Logic},
  year =         2003,
  volume =       42,
  number =       1,
  pages =        {59--87}
}

@Article{Takahashi-IandC,
  author = 	 {Masako Takahashi},
  title = 	 {Parallel reductions in $\lambda$-calculus},
  journal = 	 {Information and Computation},
  year = 	 1995,
  volume =	 118,
  number =	 1,
  pages =	 {120--127},
  month =	 {April}
}
