?url_ver=Z39.88-2004&rft_id=10.1109%2FICOS.2011.6079270&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Fazal-E-Amin&rft.au=Fazal-E-Amin&rft.isbn=9781612849317&rft.date=2011&rft.title=Using+open+source+components+in+software+product+lines+-+An+exploratory+study&rft.genre=proceeding