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INSTITUTE OF PHYSICS CONFERENCE SERIES, vol. 145, page. 775 - 778, 1996-01

IEEE ELECTRON DEVICE LETTERS, vol. 16, no. 3, page. 109 - 111, 1995-03

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, vol. 34, no. 10B, page. L1329 - L1331, 1995-10-15

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, vol. 34, no. 2B, page. 1176 - 1180, 1995-02