| Handbook of space security KU Schrogl, PL Hays, J Robinson, D Moura, C Giannopapa Springer Reference, 2015 | 85 | 2015 |
| United States military space: Into the twenty-first century PL Hays DIANE Publishing, 2002 | 61 | 2002 |
| American defense policy PL Hays, BJ Vallance, AR Van Tassell JHU Press, 1997 | 54 | 1997 |
| Toward a theory of spacepower: selected essays CD Lutes Smashbooks, 2011 | 53 | 2011 |
| Towards a theory of spacepower PL Hays, CD Lutes Space Policy 23 (4), 206-209, 2007 | 42 | 2007 |
| Space and Security PL Hays Bloomsbury Publishing, 2011 | 32 | 2011 |
| Spacepower for a New Millennium: Space and US National Security PL Hays (No Title), 2000 | 31 | 2000 |
| Struggling towards space doctrine: US military space plans, programs, and perspectives during the cold war PL Hays Fletcher School of Law and Diplomacy (Tufts University), 1994 | 29* | 1994 |
| Countering the Proliferation and Use of Weapons of Mass Destruction PL Hays, VJ Jodoin, AR Van Tassel McGraw Hill, 1998 | 24 | 1998 |
| Space and the military PL Hays Space and Defense Policy, 167-218, 2009 | 23 | 2009 |
| Going Boldly—Where? P Hays, K Mueller Aerospace Power Journal 15 (1), 34-34, 2001 | 19 | 2001 |
| A roadmap for assessing space weapons MP Gleason, PL Hays Aerospace Corporation, Center for Space Policy and Strategy, 2020 | 16 | 2020 |
| Spaceflight: the development of science, surveillance, and commerce in space RD Launius, EM Conway, AK Johnston, ZC Wang, MH Hersch, ... Proceedings of the IEEE 100 (Special Centennial Issue), 1785-1818, 2012 | 16 | 2012 |
| Economic Development of the Solar System: The Heart of a 21st-century Spacepower Theory D Wingo, CD Lutes, PL Hays Toward a Theory of Spacepower: Selected Essays, 2015 | 14 | 2015 |
| Getting the Most Deterrent Value from US Space Forces MP Gleason, PL Hays Center for Space Policy and Strategy, 3, 2020 | 11 | 2020 |
| Spacepower theory PL Hays Handbook of space security, 57-79, 2015 | 9 | 2015 |
| Toward a US Grand Strategy in Space E Dolman, P Hays, KP Mueller roundtable, George C. Marshall Institute, Washington, DC 10, 2006 | 9 | 2006 |
| International space security setting: an introduction PL Hays Handbook of Space Security: Policies, Applications and Programs, 3-7, 2020 | 7 | 2020 |
| Spacepower theory and organizational structures PL Hays Handbook of Space Security: Policies, Applications and Programs, 49-72, 2020 | 6 | 2020 |
| Real Constraints on Spacepower MEB France, JJ Sellers, CD Lutes, PL Hays Toward a Theory of Spacepower: Selected Essays, 57-58, 2011 | 6 | 2011 |