1
Published 1998
2
3
by Ahmed
Published 2006
4
by Cleveland
Published 1985
5
by Douglas
Published 1993
6
by Nasr
Published 1996
7
by Vikor
Published 1995
8
by Sanyal
Published 2006
9
by Fierro
Published 2006
10
11
by Fidai
Published 1989
12
by Lings
Published 1994
13
Published 1985
14
Published 1988
15
Published 2001
16
by Patel
Published 2007
17
by Hartmann
Published 2013