@article{DBLP:journals/tpds/HelmboldM90,
  author    = {David P. Helmbold and
               Charles E. McDowell},
  title     = {Modeling Speedup ({\it n}) Greater than {\it n}},
  journal   = {IEEE Trans. Parallel Distrib. Syst.},
  volume    = {1},
  number    = {2},
  year      = {1990},
  pages     = {250-256},
  ee        = {http://doi.ieeecomputersociety.org/10.1109/71.80148},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}