@article{KleinpeterFrank2009,
  author    = {Erich Kleinpeter and Andrea Frank},
  title     = {Quantification of the push-pull effect in substituted alkynes : evaluation of +/- I/+/- M substituent effects in terms of C C bond length variation},
  doi       = {10.1021/Jp9024359},
  url       = {http://pubs.acs.org/journal/jpcafh},
  year      = {2009},
}