@article{DBLP:journals/jss/Sanchez-SeguraCMAJM04,
  author    = {Maria Isabel S{\'a}nchez Segura and
               Juan J. Cuadrado and
               Ana Mar\'{\i}a Moreno and
               Antonio de Amescua Seco and
               Ang{\'e}lica de Antonio Jim{\'e}nez and
               Oscar Marb{\'a}n},
  title     = {Virtual reality systems estimation vs. traditional systems
               estimation},
  journal   = {Journal of Systems and Software},
  volume    = {72},
  number    = {2},
  year      = {2004},
  pages     = {187-194},
  ee        = {http://dx.doi.org/10.1016/S0164-1212(03)00173-0},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}