column
2000, 11(2): 145-153.
2000, 11(2): 165-172.
2000, 11(2): 180-188.
2000, 11(2): 205-212.
2000, 11(2): 213-220.
2000, 11(2): 228-235.
2000, 11(2): 242-248.