1. https://forum.effectivealtruism.org/posts/CmNBmSf6xtMyYhvcs/descriptive-population-ethics-and-its-relevance-for-cause#Normative_and_expected_ratios__aka_exchange_rates_and_future_optimism_, Access date: October 2, 2021.
2. https://medium.com/@KevinKohlerFM/cosmic-anarchy-and-its-consequences-b1a557b1a2e3, Access date: 10/4/21.
3. Ethics of colonization: arguments from existential risk;Abney;Futures,2019
4. The Five Ages of the Universe: Inside the Physics of Eternity;Adams,1999
5. Althaus, D.., 2018. Descriptive population ethics and its relevance for cause prioritization.