1
2
Published 2007
3
Published 2007
4
Published 2002
5
6
Published 1994
7
8
Published 2004
9
10
11
Published 2006
12
by Harris
Published 1985
13
Published 1995
14
Published 1995
15
by Beauchamp
Published 1994
16
by Meilaender
Published 2005
17
Published 2006
18
by Sarkar
Published 2005
19
by De Grazia
Published 2005
20
by Eberl
Published 2006