@Proceedings{mehdixel04,
  title     = {{P}rogramming {M}ulti {A}gent {S}ystems ({ProMAS} '03)},
  year      = {2004},
  editor    = {M.~Dastani and J.~Dix and Amal~El~Fallah~Segrouchni},
  publisher = {Springer},
  address   = {Berlin},
  series    = {LNCS},
  number    = {}
}