@Article{jennings2000,
  author = {N.R. Jennings},
  title  = {On agent-based software engineering},
  journal = {Artificial Intelligence},
  year   = {2000},
  number = {2},
  url    = {},

  const  = {\ text}
}
@Article{jennings2000,
  author = {N.R. Jennings},
  title  = {On agent-based software engineering},
  journal = {Artificial Intelligence},
  year   = {2000},
  number = {2},
  url    = {},

  const  = {\ text}
}
@Article{journals/ai/Jennings00,
  author = {Nicholas R. Jennings},
  title  = {On agent-based software engineering.},
  journal = {Artif. Intell.},
  year   = {2000},
  number = {2},
  url    = {http://dblp.uni-trier.de/db/journals/ai/ai117.html#Jennings00},

  const  = {\ text}
}