CohenC77'

@article{DBLP:journals/spe/CohenC77,
  author    = {Jacques Cohen and
               Neal Carpenter},
  title     = {A Language for Inquiring about the Run-time Behaviour of
               Programs},
  journal   = {Softw., Pract. Exper.},
  volume    = {7},
  number    = {4},
  year      = {1977},
  pages     = {445-460},
  ee        = {http://dx.doi.org/10.1002/spe.4380070403},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}