1
Published 1995
2
by HUNT
Published 2003
3
by Wiebes
Published 2007
5
by Kaplan
Published 2008
6
by Mathur
Published 2008
7
by Forsyth
Published 2009
8
by Hiles
Published 2007
9
by Loh
Published 2009
10
by Harvard Business Review
Published 2008
11
by Atwood
Published 2007
12
by Hobbs
Published 2008
13
by Barrow
Published 2009
14
by Tom
Published 2006
15
by Blyth
Published 2009
16
by Hiles
Published 2011
17
by Zeid
Published 2014
18
by Marr
Published 2014
19
by Gratton
Published 2014
20
by Hazelton
Published 2012