1
Published 1996
2
by Mathieson, Donald J.
Published 1993
3
by Masson, Paul R.
Published 1990
4
by Athukorala, Premachandra
Published 2001
5
Published 2000
6
Published 1991
7
8
9
Published 1996
10
by Varman-Schneider, Benu
Published 1991
11
by Woodward, David
Published 2001
12
by George, Robert Lloyd
Published 1992
13
Published 2001
14
Published 1997
15
16
Published 2000
17
Published 2003
18
Published 1998
19
by Athukorala, Prema-chandra
Published 2001
20
Published 1990