IEICE TRANSACTIONS ON ELECTRONICS, vol. E90C, no. 2, page. 351 - 358, 2007-02
JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 24, no. 8, page. 3028 - 3034, 2006-08
IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 17, no. 8, page. 1731 - 1733, 2005-08