1
by Martini, Jeffrey
Published 2013
Rand Corporation

2

3
by Miller, Laurel E.
Published 2013
RAND Corporation

4
by Crane, Keith
Published 2008
RAND Corp.

5
by Bruce, James B.
Published 2010
RAND

6
by Martini, Jeffrey
Published 2016
RAND

8
by Chivvis, Christopher S.
Published 2014
RAND

9
by Martini, Jeffrey
Published 2013
RAND Corporation