JOURNAL OF APPLIED PHYSICS, vol. 87, no. 10, page. 7349 - 7353, 2000-05-15
JOURNAL OF CHEMICAL PHYSICS, vol. 117, no. 22, page. 9973 - 9976, 2002-12-08
ELECTRONICS LETTERS, vol. 40, no. 24, page. 1556 - 1558, 2004-11-25