@article{DBLP:journals/siamcomp/HemaspaandraW02,
  author    = {Edith Hemaspaandra and
               Gerd Wechsung},
  title     = {The Minimization Problem for Boolean Formulas},
  journal   = {SIAM J. Comput.},
  volume    = {31},
  number    = {6},
  year      = {2002},
  pages     = {1948-1958},
  ee        = {http://dx.doi.org/10.1137/S0097539799362639},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}