OPTICS LETTERS, vol. 34, no. 6, page. 728 - 730, 2009-03-15
OPTICS LETTERS, vol. 33, no. 24, page. 2907 - 2909, 2008-12-15
OPTICS LETTERS, vol. 33, no. 21, page. 2527 - 2529, 2008-11-01
OPTICS LETTERS, vol. 31, no. 5, page. 601 - 603, 2006-03-01