References
Stephen Baxter
(2015). The cold equations: extraterrestrial liberty in science fiction. In C. S. Cockell (ed.) The meaning of liberty beyond earth (pp. 13-31). Dordrecht: Springer.
with Crawford Ian A. (2015). The lethality of interplanetary warfare: a fundamental constraint on extraterrestrial liberty. In C. S. Cockell (ed.) The meaning of liberty beyond earth (pp. 187-198). Dordrecht: Springer.