PHYSICAL REVIEW B, vol. 61, no. 15, page. 9975 - 9978, 2000-04-15
PHYSICAL REVIEW B, vol. 61, no. 12, page. 8250 - 8255, 2000-03-15
PHYSICAL REVIEW LETTERS, vol. 84, no. 8, page. 1724 - 1727, 2000-02-21
PHYSICAL REVIEW B, vol. 61, no. 7, page. 4503 - 4506, 2000-02-15
PHYSICAL REVIEW B, vol. 61, no. 3, page. 1688 - 1691, 2000-01-15
JOURNAL OF CHEMICAL PHYSICS, vol. 112, no. 2, page. 723 - 730, 2000-01-08