JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 40, no. 2, page. 232 - 236, 2002-02
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, vol. 21, no. 7, page. 1391 - 1396, 2004-07
PHYSICS LETTERS A, vol. 329, no. 6, page. 464 - 474, 2004-09-06
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 50, no. 5, page. 1466 - 1470, 2007-05
PHYSICAL REVIEW E, vol. 73, no. 1, 2006-01
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 44, no. 5, page. 1234 - 1238, 2004-05