?url_ver=Z39.88-2004&rft_id=10.1016%2FS1003-9953(10)60243-5&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ali&rft.au=Ali%2C+S.&rft.aufirst=S.&rft.issue=6&rft.volume=20&rft.issn=10039953&rft.atitle=Development+of+niobium-promoted+cobalt+catalysts+on+carbon+nanotubes+for+Fischer-Tropsch+synthesis&rft.pages=659-663&rft.title=Journal+of+Natural+Gas+Chemistry&rft.date=2011&rft.genre=article