FUSION ENGINEERING AND DESIGN, vol. 46, no. 2-4, page. 405 - 411, 1999-11
PHYSICS LETTERS A, vol. 255, no. 3, page. 154 - 159, 1999-05-10
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 34, no. 4, page. 333 - 338, 1999-04