?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Feijoo+Gonzalez%2C+Claudio+Antonio&rft.aulast=Feijoo+Gonzalez&rft.aufirst=Claudio+Antonio&rft.date=2012&rft.title=Economics+and+forecast+of+energy+consumption+in+NGN+networks%3A+the+case+of+Spain&rft.btitle=19th+International+Telecommunication+Society+Biennial+Conference&rft.tpages=15&rft.genre=proceeding