PHYSICAL REVIEW B, vol. 58, no. 15, page. 9817 - 9825, 1998-10-15
PHYSICS LETTERS A, vol. 316, no. 3-4, page. 233 - 237, 2003-09-22
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 40, no. 2, page. 232 - 236, 2002-02
JOURNAL OF POWER ELECTRONICS, vol. 10, no. 3, page. 300 - 305, 2010-05
PHYSICAL REVIEW LETTERS, vol. 102, no. 7, page. 76401 - 76401, 2009-02-20