?url_ver=Z39.88-2004&rft_id=10.1109%2FVNC.2014.7013344&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Guan&rft.aufirst=Ke&rft.au=Guan%2C+Ke&rft.isbn=978-1-4799-7660-7&rft.date=2014&rft.title=Excess+propagation+loss+for+train-to-x+communications+in+curved+subway+tunnels&rft.btitle=2014+IEEE+Vehicular+Networking+Conference+(VNC)&rft.genre=proceeding