WO2008057713-A2  SALIM K M ET AL: "Development of a fuel cell power conditioner system" 27 July 1999 (1999-07-27), POWER ELECTRONICS AND DRIVE SYSTEMS, 1999. PEDS '99. PROCEEDINGS OF THE IEEE 1999 INTERNATIONAL CONFERENCE ON HONG KONG 27-29 JULY 1999, PISCATAWAY, NJ, USA,IEEE, US, PAGE(S) 1153-1156 , XP010351973 ISBN: 0-7803-5769-8 abstract figure 1.3;  SOBOL WLAD T: "High frequency x-ray generator basics" February 2002 (2002-02), MEDICAL PHYSICS, AIP, MELVILLE, NY, US, PAGE(S) 132-144 , XP012011709 ISSN: 0094-2405 page 132, column 1, line 19 - page 133, column 2, line 4 figures 1,2WO2008057713-A3  CUNDIFF STEVEN T ET AL: "Optical frequency synthesis based on mode-locked lasers", REVIEW OF SCIENTIFIC INSTRUMENTS, AMERICAN INSTITUTE OF PHYSICS, US, vol. 72, no. 10, October 2001 (2001-10-01), pages 3749 - 3771, XP012038830, ISSN: 0034-6748;  SONG Y W ET AL: "40-nm-Wide Tunable Fiber Ring Laser With Single-Mode Operation Using a Highly Stretchable FBG", IEEE PHOTONICS TECHNOLOGY LETTERS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 13, no. 11, November 2001 (2001-11-01), XP011047843, ISSN: 1041-1135;  SOBOL WLAD T: "High frequency x-ray generator basics" February 2002 (2002-02), MEDICAL PHYSICS, AIP, MELVILLE, NY, US, PAGE(S) 132-144 , XP012011709 ISSN: 0094-2405 page 132, column 1, line 19 - page 133, column 2, line 4 figures 1,2;  SALIM K M ET AL: "Development of a fuel cell power conditioner system" 27 July 1999 (1999-07-27), POWER ELECTRONICS AND DRIVE SYSTEMS, 1999. PEDS '99. PROCEEDINGS OF THE IEEE 1999 INTERNATIONAL CONFERENCE ON HONG KONG 27-29 JULY 1999, PISCATAWAY, NJ, USA,IEEE, US, PAGE(S) 1153-1156 , XP010351973 ISBN: 0-7803-5769-8 abstract figure 1.3;  SOBOL WLAD T: "High frequency x-ray generator basics", February 2002, MEDICAL PHYSICS, AIP, MELVILLE, NY, US, PAGE(S) 132-144, ISSN: 0094-2405, XP012011709;  SALIM K M ET AL: "Development of a fuel cell power conditioner system", 27 July 1999, POWER ELECTRONICS AND DRIVE SYSTEMS, 1999. PEDS '99. PROCEEDINGS OF THE IEEE 1999 INTERNATIONAL CONFERENCE ON HONG KONG 27-29 JULY 1999, PISCATAWAY, NJ, USA,IEEE, US, PAGE(S) 1153-1156, ISBN: 0-7803-5769-8, XP010351973