Harrop60'

BibTeX

@article{DBLP:journals/jsyml/Harrop60,
  author    = {Ronald Harrop},
  title     = {Concerning Formulas of the Types A --$>$B V C, A --$<$
               (Ex)B(x)},
  journal   = {J. Symb. Log.},
  volume    = {25},
  number    = {1},
  year      = {1960},
  pages     = {27-32},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}