@article{DBLP:journals/eor/PapadopoulouPK07,
  author    = {Maria P. Papadopoulou and
               George F. Pinder and
               George P. Karatzas},
  title     = {Flexible time-varying optimization methodology for the solution
               of groundwater management problems},
  journal   = {European Journal of Operational Research},
  volume    = {180},
  number    = {2},
  year      = {2007},
  pages     = {770-785},
  ee        = {http://dx.doi.org/10.1016/j.ejor.2006.02.041},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}