1
2
3
by Yeoh
Published 2003
4
by Koopman
Published 1991
5
by Fukuda
Published 1988
6
7
by Saeed
Published 1986
8
by Matsumoto
Published 1991
9
by Anyansi-Archibong
Published 1987
10
11
Published 1992
12
by Vijandran
Published 1987
13
14
by Whitehill
Published 1991
15
by Deming
Published 1986
16
by Peters
Published 1985
17
18
by Gummesson
Published 1991
19
by Peters
Published 1992
20
by Imai
Published 1991