@article{DBLP:journals/cas/Villacampa-EsteveCUS02,
  author    = {Yolanda Villacampa-Esteve and
               M. A. Castro-Lopez and
               Josep Lluis Us{\'o}-Dom{\`e}nech and
               Patricia Sastre-V{\'a}zquez},
  title     = {Notional Logic of Systems},
  journal   = {Cybernetics and Systems},
  volume    = {33},
  number    = {3},
  year      = {2002},
  pages     = {189-201},
  ee        = {http://dx.doi.org/10.1080/019697202753551602},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}