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JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, vol. 43, no. 11A, page. L1433 - L1435, 2004-11-01
PHYSICA STATUS SOLIDI B-BASIC RESEARCH, vol. 241, no. 12, page. 2771 - 2774, 2004-10
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PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, vol. 188, no. 1, page. 379 - 382, 2001-11
MRS INTERNET JOURNAL OF NITRIDE SEMICONDUCTOR RESEARCH, vol. 6, no. 4, page. 1 - 7, 2001-01