?url_ver=Z39.88-2004&rft_id=10.1007%2Fs00231-011-0915-4&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Tiruselvam%2C+R.&rft.aulast=Tiruselvam&rft.aufirst=R.&rft.pages=641-651&rft.atitle=Double+tube+heat+exchanger+with+novel+enhancement%3A+Part+I-flow+development+length+and+adiabatic+friction+factor&rft.volume=48&rft.issn=09477411&rft.issue=4&rft.date=2012&rft.title=Heat+and+Mass+Transfer%2FWaerme-+und+Stoffuebertragung&rft.genre=article