@article{962516,
      author = {Silva, Elvira, and Stefanou, Spiro E., and Oude Lansink,  Alfons,},
      url = {http://library.usi.edu/record/962516},
      title = {Dynamic efficiency and productivity measurement /},
      recid = {962516},
      pages = {1 online resource (248 pages) :},
}