JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, vol. 38, no. 12A, page. 6821 - 6826, 1999-12
PHYSICAL REVIEW B, vol. 88, no. 18, page. 184404, 2013-11-04
PHYSICAL REVIEW B, vol. 84, no. 2, page. 24426, 2011-07-15
Journal of Molecular Biology, vol. 407, no. 3, page. 413 - 424, 2011-04