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