?url_ver=Z39.88-2004&rft_id=10.1063%2F1.5075554&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=S.W.Y.&rft.aulast=Cheng&rft.au=Cheng%2C+S.W.Y.&rft.issn=0094243X&rft.isbn=9780735417618&rft.title=Numerical+investigation+on+the+heat+transfer+of+wellbore+heat+extractor&rft.date=2018&rft.genre=proceeding