1
Published 1997
2
by Hare
Published 2003
3
Published 2004
4
Published 2006
5
by Collins, 1961
Published 2006
6
7
Published 2007
8
by Guillain
Published 2009
9
by Guillain
Published 2009
10
11
by Collins
Published 2003
12
Published 2005
13
by Koppett
Published 1994
14
Published 1996
15
by Donnelly
Published 1997
16
by Morgan
Published 2001
17
Published 1999
18
19
by Hanna
Published 1999
20
by Bale
Published 1996