JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, vol. 36, no. 3B, page. 1389 - 1393, 1997-03
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol. 145, no. 10, page. 3581 - 3585, 1998-10
JOURNAL OF APPLIED PHYSICS, vol. 86, no. 3, page. 1542 - 1547, 1999-08-01
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, vol. 42, no. 4B, page. 2382 - 2386, 2003-04