1
Published 1995
2
by Beauchamp
Published 1994
3
by Meilaender
Published 2005
4
Published 2006
5
by Sarkar
Published 2005
6
by De Grazia
Published 2005
7
by Eberl
Published 2006
8
Published 2006
9
Published 1994
10
11
12
Published 2007
13
Published 2007
14
Published 2004
15
16
Published 2002
17
18
Published 1995
19
Published 1998
20