Refuges

Church, George (2022) SafeHomexSafeHomx (Home Sweet Biome): Biosecurity, refuges and/or ‘space colonies on earth’, George Church’s Website.

Church, George (2022) SafeHomex (Home Sweet Biome): Biosecurity, refuges and/or ‘space colonies on earth’.

Baum, Seth D. (2015) Confronting the threat of nuclear winter, Futures, vol. 72, pp. 69–79.
Contains a brief discussion of refuges in section 4.2 (p. 7).