Caicedo86'

BibTeX

@article{DBLP:journals/jsyml/Caicedo86,
  author    = {Xavier Caicedo},
  title     = {A Simple Solution to Friedman's Fourth Problem},
  journal   = {J. Symb. Log.},
  volume    = {51},
  number    = {3},
  year      = {1986},
  pages     = {778-784},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}