@article{DBLP:journals/ce/EspinosaNBB05,
  author    = {Enrique David Espinosa and
               Julieta Noguez and
               Bedrich Benes and
               Abel Bueno},
  title     = {POLizied e-Learning using contract management},
  journal   = {Computers {\&} Education},
  volume    = {45},
  number    = {1},
  year      = {2005},
  pages     = {75-103},
  ee        = {http://dx.doi.org/10.1016/j.compedu.2004.04.012},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}