Computer Simulations of Space Societies
https://www.springer.com/us/book/9783319905594

What We Know About Extraterrestrial Intelligence
https://www.springer.com/us/book/9783319444550

The Ethics of Space Exploration
https://www.springer.com/us/book/9783319398259

Dissent, Revolution and Liberty Beyond Earth
https://www.springer.com/us/book/9783319293479

Human Governance Beyond Earth
https://www.springer.com/us/book/9783319180625

The Meaning of Liberty Beyond Earth
https://www.springer.com/us/book/9783319095660

Extraterrestrial Intelligence and Human Imagination
https://www.springer.com/us/book/9783319105505

New Comparative Metric for Evaluating Spacecraft Radiation Shielding
https://arc.aiaa.org/doi/abs/10.2514/1.A34360

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