Mendell, W W.(2001). A gateway for human exploration of space? The weak stability boundary. Space Policy, 17(1), 13-17. doi:10.1016/s0265-9646(00)00058-8
MLA CitationMendell, Wendell W. "A Gateway for Human Exploration of Space? The Weak Stability Boundary". Space Policy, 17.1 ( 2001 ): 13-17.
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