1
2
3
Published 2007
4
5
by Chong
Published 2007
6
7
Published 1993
8
Published 1993
9
by Thompson
Published 1992
10
Published 1994
11
12
by Heater
Published 1993
13
by Rosenau
Published 1990
14
by Chandran
Published 2007
15
Published 1990
16
Published 1993
17
by Woodwell
Published 2007
18
by Cortright
Published 2008
19
20
by Holsti, 1935-
Published 1992