1
by Grint
Published 1997
2
by O'Brien
Published 2008
3
by Wood
Published 2006
4
by Golub
Published 1996
5
by Khoshafian
Published 2007
6
Published 2009
7
by Hall
Published 2011
8
by Palm
Published 2011
9
by Piegl
Published 1997
10
by Higham
Published 2005
11
by Perkins
Published 2009
12
by Geduld
Published 2009
13
by Weynand
Published 2010
14
by Tocci
Published 2011
15
by BODNAR
Published 2010
16
by Magal
Published 2009
17
by Zwolinski
Published 2004
18
by Khashi'ah Yusof
Published 2009
19
by Eriksson
Published 2000
20
by Toor
Published 1998