1@manual{extra:vtd, 2 author = {{Intel Corporation}}, 3 title = {Intel Virtualization Technology for Directed I/O --- Architecture Specification}, 4 month = feb, 5 year = 2011, 6 note = {\url{http://download.intel.com/technology/computing/vptech/Intel(r)_VT_for_Direct_IO.pdf}} 7} 8