Kelly, Brian. "The Four Policemen and. Postwar Planning, 1943–1945: The Collision of Realist and. Idealist Perspectives". Retrieved June 21, 2014. Hoopes
Carlo (26–28 June 2003). "Nuclear Processes at Solar Energy". Physics in Collision: ۲۱. arXiv:astro-ph/0308537. Bibcode:2003phco.conf...21B. Goupil, M. J
1038/35089010. PMID 11507633. D. J. Stevenson (1987). "Origin of the moon – The collision hypothesis". Annual Review of Earth and Planetary Sciences. 15 (1): 271
Contributors, en.wikipedia (به انگلیسی) {{citation}}: |نویسنده= has generic name (help); External link in |عنوان= (help) Retrieved on 2009-09-19. Japan Aerospace