@article{792066,
      author = {Albert, Mathias. and Hilkermeier, Lena,},
      url = {http://library.usi.edu/record/792066},
      title = {Observing international relations Niklas Luhmann and world  politics / [electronic resource] :},
      publisher = {Routledge,},
      recid = {792066},
      pages = {xiv, 254 p.},
      address = {London ;},
      year = {2004},
}