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Trend in Mathematics, 한국과학기술대학교수리과학연구소, page. 58 - 61, 1998-08-01

제2회 응용수학포럼, 1998-01-01

대한수학회, 1998-01-01

Proceeding of KSIAM, 1998-01-01

부산외국어대학교, 1998-12-01

Algebraic combinatorics and combinatorical quadratic forms, 1998-11-09

Geometry Seminar, 1998-11-01

RIMS Autormorphic forms and Number theory conference, page. 74 - 80, 1998-10-01

5th World Congress on Intelligent Transport Systems, 1998-01-01

Special Colloquium, 1998-04-01