41
by Byrd-Brebenner
Published 2009
42
by Brown
Published 2011
43
by Benardot
Published 2012
44
by Cardwell
Published 2012
45
by Skolnik
Published 2010
46
47
by Eberle
Published 2007
48
by Mueller
Published 2013
49
Published 2012
50
by Kleiner
Published 2014
51
by Eberle
Published 2014
52
by Dunford
Published 2015
53
by Mueller
Published 2013
54
by Litt
Published 2004
55
56
57
by Drummond
Published 2004
58
by Smolin
Published 2003
59
by Groff
Published 1999
60
by Suriah Abdul Rahman
Published 2004