EP1770811-A2  M.J. VALCO ET AL.: "Emerging oil-free turbomachinery technology for military propulsion and power applications"[Online] 30 September 2004 (2004-09-30), XP002410882 Retrieved from the Internet: URL:http://web.archive.org/web/20040930074 132/http://www.grc.nasa.gov/WWW/Oilfree/Em erging+Oil-Free+Turbomachinery+Technology. pdf0x3E [retrieved on 2006-12-07];  M.J. VALCO ET AL.: "Emerging oil-free turbomachinery technology for military propulsion and power applications"[Online] 30 September 2004 (2004-09-30), XP002410882 Retrieved from the Internet: URL:http://web.archive.org/web/20040930074132/http://www.grc.nasa.gov/WWW/Oilfree/Emerging+Oil-Free+Turbomachinery+Technology.pdf [retrieved on 2006-12-07];  M.J. VALCO ET AL.: "Emerging oil-free turbomachinery technology for military propulsion and power applications"[Online] 30 September 2004 (2004-09-30), XP002410882 Retrieved from the Internet: URL:http:web.archive.orgweb20040930074 132http:www.grc.nasa.govWWWOilfreeEm erging+Oil-Free+Turbomachinery+Technology. pdf [retrieved on 2006-12-07];  M.J. VALCO ET AL.: "Emerging oil-free turbomachinery technology for military propulsion and power applications"[Online] 30 September 2004 (2004-09-30), XP002410882 Retrieved from the Internet: URL:http:web.archive.orgweb20040930074 132http:www.grc.nasa.govWWWOilfreeEm erging+Oil-Free+Turbomachinery+Technology. pdf0x3E [retrieved on 2006-12-07];  M.J. VALCO ET AL.: "Emerging oil-free turbomachinery technology for military propulsion and power applications"[Online] 30 September 2004 (2004-09-30), XP002410882 Retrieved from the Internet: URL:http:web.archive.orgweb20040930074 132http:www.grc.nasa.govWWWOilfreeEm erging+Oil-Free+Turbomachinery+Technology. pdf0xE2,0x89,0xAB [retrieved on 2006-12-07];  M.J. VALCO ET AL.: "Emerging oil-free turbomachinery technology for military propulsion and power applications"[Online] 30 September 2004 (2004-09-30), XP002410882 Retrieved from the Internet: URL:http:web.archive.orgweb20040930074132http:www.grc.nasa.govWWWOilfreeEmerging+Oil-Free+Turbomachinery+Technology.pdf [retrieved on 2006-12-07];  M.J. VALCO ET AL.: "Emerging oil-free turbomachinery technology for military propulsion and power applications"[Online] 30 September 2004 (2004-09-30), XP002410882 Retrieved from the Internet: URL:http:web.archive.orgweb20040930074 132http:www.grc.nasa.govWWWOilfreeEm erging+Oil-Free+Turbomachinery+Technology. pdf&gt; [retrieved on 2006-12-07]