Karr81'

BibTeX

@article{DBLP:journals/jacm/Karr81,
  author    = {Michael Karr},
  title     = {Summation in Finite Terms},
  journal   = {J. ACM},
  volume    = {28},
  number    = {2},
  year      = {1981},
  pages     = {305-350},
  ee        = {http://doi.acm.org/10.1145/322248.322255},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}