IEEE Photonics Technology Letters
IEEE Photonics Technology Letters > 2007 > 19 > 11 > 861 - 863
IEEE Photonics Technology Letters > 2007 > 19 > 19 > 1565 - 1567
IEEE Photonics Technology Letters > 2008 > 20 > 13 > 1208
IEEE Photonics Technology Letters > 2009 > 21 > 10 > 639 - 641