1
2
Published 2004
3
by Hale
Published 2003
4
by Kolkhorst
Published 2004
5
by Haff
Published 2012
6
7
by Weinberg
Published 2003
8
by Kennedy
Published 2005
9
Published 2005
10
11
12
13
by Gardiner
Published 2005
14
Published 2012
15
Published 2012
16
by Fink
Published 2012
17
18
by J. P. Sharma
Published 2005
19
by D. Sandhya
Published 2005
20
by Raven
Published 2013