BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 10, no. 2, page. 185 - 190, 1989-04
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 11, no. 4, page. 313 - 317, 1990-08-20
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 9, no. 1, page. 44 - 48, 1988-02