NiemiJ85'

BibTeX

@article{DBLP:journals/is/NiemiJ85,
  author    = {Timo Niemi and
               Kalervo J{\"a}rvelin},
  title     = {Straightforward formalization of the relational model},
  journal   = {Inf. Syst.},
  volume    = {10},
  number    = {1},
  year      = {1985},
  pages     = {65-76},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}