Choi, JW; Hong, Daniel Seungbum; Jun, BH; Sung, TH; No, Kwangsoo; Park, Y, JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES REVIEW PAPERS, v.38, no.4A, pp.1941 - 1944, 1999-04
Bae, Sung Joon; Hong, Daniel Seungbum; Kim, Eun Ah; Shin, Woo Suck; Cho, Chang Hyun; Kim, Young Kun; Bae, Youn Soo; et al, JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES REVIEW PAPERS, v.35, no.3, pp.1716 - 1719, 1996-03
Choi, J; Kim, E; Park, SY; Lee, JS; Sung, TH; Park, Y; No, Kwangsoo, JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES REVIEW PAPERS, v.41, no.9, pp.5567 - 5571, 2002-09