@article{50162,
      recid = {50162},
      author = {Sterzi, Valerio, and Maronero, Cecilia, and Orsatti,  Gianluca, and Vezzulli, Andrea,},
      title = {Non-practicing entities in Europe : an empirical analysis  of patent acquisitions at the European Patent Office.},
      pages = {1 online resource (pp. 1271–1297)},
      url = {http://tind.wipo.int/record/50162},
}