CHEMICAL PHYSICS LETTERS, vol. 368, no. 5-6, page. 625 - 629, 2003-01-24
ETRI JOURNAL, vol. 23, no. 3, page. 97 - 105, 2001-09
APPLIED PHYSICS LETTERS, vol. 78, no. 9, page. 1249 - 1251, 2001-02-26