1
Published 1992
2
Published 1993
3
by Al-Atas
Published 1992
4
5
by Allison
Published 1988
6
by Brun
Published 1990
7
by Raghavan
Published 1990
8
9
Published 1992
10
by Porter
Published 1984
11
by Clapham
Published 1990
12
Published 1992
13
by McWilliams
Published 1993
14
by Duncan
Published 1990
15
Published 1989
16
by Barbier
Published 2005
17
by Hadjor
Published 1993
18
19
Published 1988
20
Published 1992