6
Published 1993
American Chemical Society

7
Published 1985
American Chemical Society

8
Published 1989
American Chemical Society

9
Published 1992
American Chemical Society

10
Published 2002
American Chemical Society

11
Published 1996
American Chemical Society

12
Published 1990
American Chemical Society

13
Published 1991
American Chemical Society

14
Published 1997
American Chemical Society

15
Published 1998
American Chemical Society

16
Published 1990
American Chemical Society

17
Published 1994
American Chemical Society

18
Published 1999
American Chemical Society

19
Published 1999
American Chemical Society

20
Published 2000
American Chemical Society